This page has an in-depth list of the most popular trading terms. Have you ever listened to a podcast or read an article about trading and wondered why we use the words we do? Don’t worry. You’re not alone. Stock market language can be difficult. Sometimes, it feels like the language people use is from a completely different country. But don’t panic. There’s no shame in not knowing what certain words or phrases mean.
Everybody’s been new to trading at some point. As you can probably tell, the stock market is rife with unique terms and industry-specific phrases. Learning these terms can go a long way in helping you understand what people are talking about. These words can also help in general market analysis and individual stock analysis. Before you dive headfirst into trading stocks, make sure you familiarize yourself and learn the language of the stock market. We’ve collected some terms here to help you familiarize yourself, and we’re constantly adding new ones to this list. Take our trading courses if you need help getting started.
Dictionary of Trading Terms
A
- ABCD Pattern
- Accredited investor
- Acorns Investing
- Adjustable Stand Up Desk
- Adobe Stock
- Airline Stocks
- AI (Algorithmic) Trading
- Ally Invest
- Alternative Investments
- Al Brooks
- AMD
- AMD vs Nvidia Stock
- American Depository
- American Stock Exchange
- Anchoring Bias
- Andrews Pitchfork Indicator
- Antsignals
- Ascending Triangle Patterns
- Asset
- Atom Finance
- At the Money Options
- Augmented Reality Stocks
- AvaTrade
- Avoid Over Trading
- Avoid Slippage
B
- Backtesting
- Backtesting Trading Strategies
- Bag Holder
- Bankruptcy
- Barchart 2022
- Basket Trade
- bearish Candlesticks
- bearish Engulfing Patterns
- bearish Harami Patterns
- Bear Call Spreads
- Bear Flag Patterns
- Bear Market
- Bear Market Stocks to Buy
- Bear Pennants
- Bear Put Spreads
- Bear Trap Trading
- Becoming a Digital Nomad Trader
- Benefits of Investing in Precious Metals
- Benzinga Pro
- Best Books on Options Trading
- Best Crypto Exchange
- Best Crypto Trading Platform
- Best Day Trading Patterns for Beginners
- Best Day Trading System
- Best Free Crypto Trading Platforms
- Best Free Day Trading Simulator
- Best Fundamental Analys Tools
- Best Futures Brokers
- Best Investing Apps for Beginners
- Best Investing Websites
- Best Long Term Dividend Stocks
- Best Month to Buy Stocks
- Best Moving Average
- Best Offshore Brokers
- Best Options Trading Platform
- Best Places to Buy Gold and Silver
- Best Real Estate Books
- Best Recession Stocks
- Best Silver Mining Stocks
- Best Stocks for Options Trading
- Best Stock News App
- Best Swing Trading Books
- Best Swing Trading Strategies Book PDF
- Best Telehealth Stocks
- Best Trading Software for Mac
- Best TV Channel for Stock News
- Best 5G Stocks
- Bet on Stock Market Going Down
- Biden Stocks
- Bid vs Ask Spread
- Biotech Stocks list
- Bitcoin Stocks list
- Black Box Stocks
- Black Box Stocks Free Trial
- Blockchain Technology
- Bloomberg Terminal
- Blow Off Tops
- Blue Chip Stocks
- Bollinger Bands
- Bollinger Bands Trading Strategy
- Bookmap
- Borrow a Stock
- Breakout
- Build Wealth
- Bullh Divergence RSI
- Bullh Vs Bearh
- Bullish Bears Trading Discord
- bullish Candlesticks
- Bullish Chart Patterns
- Bullish Engulfing Patterns
- bullish Harami Patterns
- bullish Homing Pigeon Patterns
- Bull Call Spreads
- Bull Flag Momentum Strategy
- Bull Flag Patterns
- Bull Pennants
- Bull Put Spreads
- Bull vs Bear Market
- Butterfly Spread Options
- Buy Futures and Options
- Buy Put Options
- Buy Shares of Stock
- Buy Stocks on Your iPhone
C
- Calendar Spreads
- Call Spread in Option
- Canadian Day Trading Taxes
- Canadian Stocks
- Candlestick Cheat Sheet
- Cargill Stock Price
- Cash App
- Catch a Falling Knife
- Cathie Wood
- Caused of Black Monday
- CBD Oil Stocks
- Centerpoint Securities
- Chande Momentum Oscillator
- Charles Schwab
- Chart IQ
- Chatterquant
- Cheddar Flow
- Choicetrade
- Choose a Forex Broker
- Choppy Market
- Citron Research
- Climate ChangeStocks
- Cloud Computing Stocks
- CMEG
- Cobra Trading
- Colmex Pro
- Commodity Stocks list
- Companies Will IPO in 2021
- Composite Index
- Computer Battery Backup
- Computer Screen Glasses
- Computer Speakers
- Consumer Staples list
- Consumer Staples list
- Consumer Staples list
- Contrarian Indicator
- Corona Stocks
- Corona Test Stocks
- Country Defaults
- Covered Calls
- Credit Spreads
- Cryptocurrency
- Crypto Crash 2021
- Crypto Market Crash
- Crypto Trading Bots
- Crypto’s, Bonds, and Volatility
- Cult Stocks
- Cup and Handle Patterns
- Cyber Security Companies
D
- Dark Cloud Cover Patterns
- Dark Pool Trading
- Das Trader
- Dax Stocks list
- Day Trade on Robinhood
- Day Trading
- Day Trading Checklist
- Day Trading Forums
- Day Trading For a Living
- Day Trading Futures
- Day Trading Options
- Day Trading Reversals Strategy
- Day Trading Secrets
- Day Trading Strategies
- Day Trading Taxes
- Day Trading Tools
- DD Stocks
- Dead Cat Bounce
- Debit Spreads
- Defense Stocks list
- DeFi
- Delta
- Descending Triangle Patterns
- Develop and Control a Trading Mindset?
- Diagonal Spreads
- Diamond Standard Coin
- Different Types Trades
- Digital Currency
- Digital Gold
- Dip Buy Stocks
- Directional Spreads
- Divergence Trading
- Diversification
- Dividend Artocrats
- Dividend Reinvestment Plan
- Dividend Versus Growth Stocks
- Doji Candlesticks
- DoorDash Stock
- Dotcom Crash
- Double Bottom Patterns
- Double Top Patterns
- Dow Jones Stocks list
- Dow theory
- Do Forex Exchange Rates Work
- Do You Know When Not to Day Trade?
- Dragonfly Doji Candlesticks
- Draw Support and Restance Levels
E
- Easy Trading System Indicator
- Ecommerce Stocks
- Economic Cycles
- Edgewonk
- Educational Stocks list
- Electric Vehicle Stocks
- Elon Musk
- Emerging Markets
- Emotional Trading
- End of Day Trading and Trade Power Hour
- eOption
- EquityZen
- Ergonomic Mouse Pad
- ESG Investing
- eSignal
- Ethereum
- Ethereum
- ETRADE
- Evening Star Patterns
- Exercise an Option
- Exercise Equipment Stocks
- EXMO Exchange
- Exponential Moving Average Formula (EMA)
- Extrinsic Value
- E-mini Futures Contracts
- E-Trade
F
- FAANG Stocks
- Face Mask Stocks to Watch
- Falcon Trading Computers
- Falling Three Methods Patterns
- Falling Wedge Patterns
- Famous Penny Stocks
- Fat Finger Trade
- Fibonacci in Forex
- Fibonacci Retracement Definition
- Fibonacci Retracement Trading Tool
- Fidelity
- Financial Advor
- Financial Contagion
- Financial Investment Opportunities
- Financial Markets
- Financial Planning Websites
- Find Gold and Silver Prices
- Find Stocks to Day Trade
- Find Stocks to Swing Trade
- Fintech
- Fintel
- Fintwit
- FinViz
- Firstrade
- First Red Day Pattern?
- Float
- Floor Traders
- FlowAlgo
- FlowTrade
- FOMO
- Food Delivery Stocks
- Forex Breakout Strategy
- Forex Candlesticks and Charts
- Forex Day Trading
- Forex Scalping Strategy That Works
- Forex Trading Essentials
- Forex Trading Legal
- Forex Trading Psychology
- Forex Trading Strategies
- Four Tips All New Traders Should Follow
- Four Wealth Strategies for a Bear Market
- Free Crypto Trading Platform
- Free Stock Analys Software
- Free Stock Charts
- FTMO
- FTSE 100 Stocks Index list
- Fundamental Analys
- Fundamental Analysis in Forex
- Fundamental Analys vs Technical Analys
- Futures Margin
- Futures Points vs Ticks?
- Futures Trading Hours
- Futures Trading Strategies
G
- GameStop Stock
- Gamma
- Gann Angles When Trading
- Gap Down Patterns
- Gap Fill Stocks
- Gap Up Patterns
- Generic Trade
- Genome Sequencing Stocks
- Get Rich Trading Options
- Get Started in Stocks
- Golden Cross Stocks
- Gold Stocks list
- Good Stocks to Short
- Good vs Bad Trading Habits
- Gravestone Doji Candlesticks
- Grocery Delivery Stocks
- Gross Domestic Product (GDP)
- Growth Stock
- Growth Stocks
- Growth Stocks vs Value Stocks
- Grow a Small Trading Account
- Gurufocus
H
- Halts
- Hammer Candlesticks
- Hanging Man Candlesticks
- Hang Seng Index Stocks list
- Happening With Subscription Stocks
- Head and Shoulders Patterns
- HEB Grocery
- Hedges for Devaluing Dollar
- Hedge Funds List
- Hedge Funds Movies
- Hedging Stocks
- Heikin Ashi
- High Frequency Trading Software
- High Wave Candlesticks
- How Long Should You Hold a Stock
- How Long It Take to Learn Day Trading
- How Much can you Make Trading Options
- How Much Do Day Traders Make
- How Much Do You Need to Invest in Stocks
- How to Delete Robinhood Account
- Hulu Stock Price
- Hurricane Stocks
- Hydrogen Fuel Cell Stocks
I
- Ichimoku Cloud Trading System
- Implied Volatility Formula
- Important Day Trading Tips
- IM Academy
- Infinity Futures Broker
- Inflation
- Insider Trading
- Interactive Brokers
- Internet of Things Companies
- Intraday Chart Setup
- Intraday Meaning
- Intraday Short Selling Strategies
- Intrinsic Value Calculator
- Inverse ETFs
- Inverse Head and Shoulders Patterns
- Inverted Cup and Handle Patterns
- Inverted Hammer Candlesticks
- Inverted Yield Curve
- Investing Daily
- Investing in a Bear Market
- Investing in Gold and Silver
- Investing.com
- Investment Banking
- Investment Mtakes
- InvestorsHub
- Investors Business Daily
- Investrade
- Invest in a Bear Market?
- Invest in Foreign Stocks
- Invest in Movie Stocks
- Invest in Music Stocks
- Invest in Stocks for Beginners With Little Money
- Invest in Web3
- Invest in Stock Market With Little Money
- In the Money
- Iron Butterflies
- Iron Condor
- IV Crush
L
- Laptops For Stock Trading
- Laptop for Trading
- Largest Sovereign Wealth Fund
- Large Cap vs Small Cap
- LEAPS Options
- Level 1
- Level 2 Trading
- Liability
- LightSpeed
- Limit Order vs Market Order
- Limit Order vs Stop Order
- List of 5 Best Day Trading Books
- Long Call Option
- Long Legged Doji Candlesticks
- Long Put Option Contract
- Long vs Short
- Losing Trades
- Low Beta in Stocks
- Low Float Penny Stocks
- Low Float Stocks
- LUDP Halt
- LUPA Stocks
M
- MACD
- MACD
- MACD Forex Strategy
- MACD Trading Strategies
- Magic Mushroom Stocks
- Make a Lot of Money Trading Stocks
- Make Extra Money Online
- Make Money Day Trading for Beginners
- Make Money in a Bear Market
- Make Money in Stock Market for Beginners
- Make Money Trading Derivatives
- Make Money with Bitcoin
- Margin Rates
- Margin Rates
- Margin Vs Cash
- MarketClub
- Market Breadth and Depth
- Market Breadth Indicators
- Market Bubble
- Market Correction
- Market Leaders
- Market Maker
- Market Sentiment
- Market Share
- Market Trading Hours
- Market Trend Technical Indicators
- Marsco Investment Corp
- Marubozu Candlestick
- Megaphone Patterns
- Meme Stocks
- Metastock
- Metaverse Stocks
- Mirror Trading
- Momentum Trading
- MOMO Trading
- Money Flow Index
- Monitor for Day Trading
- Monkeypox Stocks
- Monthly Dividends
- Moomoo
- Morningstar
- Morning Panic Pattern
- Morning Star Patterns
- Most Popular Day Trading Indicators
- Motif Investing
- MotiveWave
- Motley Fool
- Mountain Bike Stocks
- Movies Like Wolf of Wall Street
- Moving Averages
- Moving Average Crossover
- Moving Average Forecasting
- Moving Average for Day Trading Forex
- Moving Average in Forex
- Moving Company Stocks
- Multibagger Stocks
- MultiCharts
- Mutual Funds or Stocks
N
O
- Offering
- Oil Stocks list
- One Percent Risk Rule
- One Simple Trick
- Online Adverting Stocks
- On Balance Volume Study
- Opening Range Breakout
- Open an Investment Account
- Open a Brokerage Account
- Open Interest
- Optimus Futures
- Options Chain
- Options Chart
- Options Collar Strategy
- Options during Stock Splits?
- Options Market Hours
- Options Straddles
- Options Strangles
- Options Strike Price
- Options Sweeps
- Options Time Decay
- Options Vega
- Option Greeks
- Order Types
- Order Types in Forex
- OTC Stocks
- OTM Credit Spreads
- OTM Spreads
- Out of Money Options
- Overweight Rating
P
- Panic of 1907?
- Paper Trade Options
- Paper Trading Account
- Parabolic Sar Indicator
- Parler Stock Price
- Pattern Day Trader
- Paul Tudor Jones
- Peloton
- Penny Pot Stocks List
- Penny Stocks
- Penny Stock Gainers
- Penny Stock Promoters
- Piercing Patterns
- Pink Sheet Stocks
- Pinning a Strike Mean
- Pinterest Stock $PINS
- Pivot Points in Forex
- Place a Futures Order
- Placing a Stop Loss Order
- Point and Figure Chart
- Poon Pill
- Popular Swing Trading Indicators
- Portable Monitors
- Power Hour
- Predict When a Stock Will Go Up
- Premarket Trading Strategy
- Price Action Trading Books
- Price Averaging
- Price Channel Line
- Private Placement
- Process of Selling Options
- Profit.ly
- Prospectus
- Protect Your Portfolio From Black Swan Events
- Pro-trading room
- PSAR Indicator
- Psychological Dangers
- Pump and Dump Penny Stocks
- Put and Call Options
- P/E Ratio
Q
R
- Radio Shack Stock Story
- Ray Dalio
- Reading Penny Stock Charts
- Read and Interpret Trading Charts for Beginners
- Read Futures Charts
- Recession Stocks
- Reddit Wallstreetbets Sentiment Tracker
- Red Herring
- Red to Green Move
- Relative Volume Indicator
- Relaxed Trading: It Attainable
- Renewable Energy Stocks
- Research Penny Stocks
- Retail Traders
- Ring Three Methods Patterns
- Ring Wedge Patterns
- Risk for Stock Assignment With Options
- Rk Free Trading
- Rk Management
- Robinhood
- Robinhood Level 2
- Robinhood vs Acorns
- Robintrack
- Robotic Surgery Stocks
- Rounding Bottom Pattern
- RSI Divergence Indicator
- RSI in Forex
- RSI Relative Strength Index Calculation and Formula
- Running Out of Trading Ideas
- Russell 2000 Stocks list
- Russian Stocks
- RV Stocks
S
- Santa Claus Rally
- Scalping Stocks
- Scanz aka EquityFeed
- Schwab Stock Slices
- Seaport Securities
- Secret to Make Money Amidst Corona Pandemic
- Sector Rotation
- SeedInvest
- Seeking Alpha
- Sell a Call
- Sell a Put
- Sell in May and Go Away
- Sentimentrader
- Shapeshift
- Shareholder
- Share Buyback
- Shitcoin
- Shooting Star Patterns
- Shortage of Cars
- Shorting
- Shorting Penny Stocks
- Shorting Market?
- Short a Stock on Robinhood
- Short Call Options Contract
- Short Put
- Short Sell Restriction
- Short Squeeze
- Short the Rip
- Sierra Chart
- Simpler Trading
- Simple Moving Average Formula
- Skills
- Software as a Service Stocks
- SogoTrade
- Space Exploration Stocks
- SPAC Bubble
- SPAC Stocks
- Spartan Trading
- SpeedTrader
- Spinning Top Candlesticks
- Sports Betting Stocks
- Sports Team Stocks
- SP500 Stocks list
- Square Cash
- Stand Up Desk Chair
- Stand Up Desk Mat
- Start Investing in Stocks
- Stash
- Stay at Home Stocks
- StockCharts
- StockCross
- StockFetcher
- Stockpile
- Stocks
- StockstoTrade
- Stocks for Day Trading
- Stocks That Are Inverse to Market
- Stocks vs Options
- StockTwits
- Stock Acronyms
- Stock Buyback Rules
- Stock Calculator
- Stock Charts for Beginners
- Stock Horizon
- Stock Leverage
- Stock Lingo
- Stock Market Close
- Stock Market Conditions
- Stock Market Crash
- Stock Market Crashes
- Stock Market Crashes
- Stock Market Crash 1929
- Stock Market Jobs
- Stock Market Language
- Stock Market Mentor
- Stock Market Scandals
- Stock Market Seasonality
- Stock Market Traders Should Know About Iceberg Orders
- Stock Market Works
- Stock Navigators
- Stock Rover
- Stock Split
- Stock Symbol for IKEA
- Stock Trader
- Stock Trend Analyzer
- Stonks Meme
- Stop Limit Order
- Strong Dollar Affect
- Summer 2022 Stocks
- Supply and Demand Zones
- Support and Resistance in Forex
- Support and Restance Trading
- SureTrader Closing
- SweepCast
- Swingtradebot
- Swing Trading Options Process
- Swing Trading Penny Stocks
- Swing Trading Strategies
- Symmetrical Triangle Patterns
- Sympathy Play
- Syndicate
- S-1 Filing
T
- Take Forex Trading Challenge
- TastyWorks
- TAS Market Profile
- Taxes on Stocks
- Tax Loss Harvesting
- TC2000
- Tech Stocks list
- Teladoc
- Terra/Luna Coin
- Theta
- ThinkorSwim
- Thinkorswim Option Contract Fees
- ThinkorSwim Tutorial Course
- Three Inside Down Patterns
- Three Inside Up Patterns
- Three Line Strike Candlesticks Patterns
- Three Outside Down Patterns
- Three Outside Up Patterns
- Three White Soldiers Patterns
- Tickeron
- Ticker Symbol
- Tick Chart
- Tick Index
- Tiktok Stock Price
- Time and Sales Data
- Time of Day to Trade Stocks
- Time Value of an Option
- Tim Sykes
- Tinder Stock
- TipRanks
- TopstepTrader
- TradersExpo
- TraderSync
- Tradervue
- Trader vs Investor
- TradeStation Broker
- TradeXchange
- TradeZero
- Trade Futures; ThinkorSwim
- Trade Ideas Scanner
- Trade Stocks With Confidence
- Trade With a Part Time Job
- Trade Gap and Go Strategy
- TradingBlock
- TradingSim
- TradingView
- Trading and Travelling Possible
- Trading Bollinger Bands in Forex
- Trading calender
- Trading Credit Spreads for a Living
- Trading Demo Accounts
- Trading Micro Futures for Beginners
- Trading Options for a Living
- Trading Scorecard
- Trading Simulators
- Trading Wdom
- Tradovate
- Travel Stocks
- TrendSpider
- Trend Line in Forex
- Triggers a Volatility Halt
- Triple Bottom Patterns
- Triple Top Patterns
- Tweezer Bottom Patterns
- Tweezer Top Patterns
- Twitter Traders
- Types of Investments
- Types of Stocks
- T1 Halt
- T3 Trading
U
V
- Value Investing vs Growth Investing
- Vape Stocks
- VectorVest
- Venom Trading
- Venture Capital
- Vertical Spreads
- Veteran’s Day
- Video Streaming Stocks
- Virgin Airlines Stock
- VIX
- Vix Trading
- Volatile Stocks
- Volume
- Volume MACD
- Volume Price Analysis
- Voodoo Lines
- Vortex Indicator
- VWAP Trading Strategy
- VW Short Squeeze
- V Bottom Patterns
W
- Wall Street Analysts
- Warren Buffett
- War Stocks
- Wash Sale Rule and Avoid It?
- Ways to Start Investing
- Wealth simple
- Webull Free Stock
- Weekly Credit Spreads
- Wellstrade
- WhaleStream
- What is Forex Trading
- Wheel Options Strategy
- Where Are All Women Traders?
- Who Owns the Stock Market
- Why I Love Trading Futures
- Why Traders Fail
- Wireless Gaming Mouses?
- Witch of Wall Street?
- Wolfe Wave Trading Strategy
- Work From Home Stocks
- Wyckoff Method
#
- 13F Filing
- 3D Printing Stocks
- 3 Bar Reversal Pattern?
- 8k Filing
- STOCK MARKET UPDATE 5-22-2019
What Is Arbitrage?
Simply put, arbitrage is when traders buy and sell the same asset in different markets at different prices. They seek to buy it in one place at a lower price and then immediately sell it in another market for a higher price. They aim to profit from the price difference. This strategy requires quick execution and large trading volumes to make meaningful profits.
There are two straightforward explanations that rely on the arbitrage opportunity:
- You can buy a product at a lower price in market A, sell it at a higher price in market B, and earn a profit. Or,
- You can buy product A at a lower price, hold onto the asset, resell it at a higher price at a later time, and make a profit.
What Causes Arbitrage?
Arbitrage opportunities can be due to various situations like differences in market inefficiencies, transaction costs, or trading restrictions.
It’s essential to note that stock market arbitrage is a risk-free strategy in theory because it exploits price discrepancies in different markets. However, arbitrage opportunities are often short-lived, as arbitrageurs’ activities tend to eliminate the price differences quickly. Therefore, successful arbitrage requires fast execution and efficient trading infrastructure.
Arbitrage in the stock market can be challenging and may require an advanced understanding of the financial markets and trading methods. It’s important to keep in mind that it’s a complex process. It’s always advisable to thoroughly understand the risks associated with any investment strategy and seek professional advice if needed.
Where Can I Find Arbitrage Opportunities?
Stock market arbitrage traders depend on sophisticated trading systems and technology to quickly identify and take advantage of opportunities. Price irregularities are common in stocks, bonds, cryptocurrencies, currencies like the Euro or US Dollar, and commodities.
You’d think it would be relatively easy and risk-free as you buy and sell at the same time. Reality, however, paints a different picture. Traders can face challenges when dealing with high transaction fees and prices that fluctuate, as they must complete transactions quickly. Further to that, it takes a sizable chunk of cash to generate any significant profits.
Example Of Arbitrage
Let’s consider a straightforward example of arbitrage: On the New York Stock Exchange (NYSE), a single share of company ABC is currently being traded for $20. At the same time, on the London Stock Exchange (LSE), a share of the same company is traded for $20.05.As you can see, there’s a price difference of $0.05. If you’re a savvy trader, you notice this and buy shares on the NYSE and immediately sell them on the LSE, pocketing the $0.05 difference. You can keep this up until there’s no stock left or the price gap closes.
It Takes a Lot of Money to Turn a Profit
As you can see from the example above, The differences in prices between products are generally small, and traders must invest a significant amount of money to earn a significant profit. Additionally, as information spreads more quickly, opportunities for arbitrage are dwindling. These opportunities have already been exploited, making them more difficult to find as the market becomes more skilled at balancing out disparities.
Is Arbitrage Even Legal?
Yes. In fact, most countries encourage arbitrage trading as it helps to reduce market inefficiencies. By facilitating market corrections and eliminating market inefficiencies, arbitrage trading helps to improve the overall market condition. Additionally, it helps to ensure that prices remain more or less the same across different markets.
Frequently Asked Questions
There are many terms used in stock market trading. Knowing what they are is important for being an informed trader and investor.
Within the realm of trading and investing exists a unique set of terms and phrases known as stock market terms. These terms range from fundamental concepts such as "dividends" and "shares" to more intricate jargon, including "earnings per share (EPS)" and "over-the-counter."
If you're new to stock trading and investing, it may seem overwhelming to understand everything. However, it can be helpful to learn some basic terms to speed up your progress. Knowing the fundamental principles of the stock market is important for making informed investment and trading decisions. Understanding the terminology is the first step in building a solid foundation.
Some frequently used expressions in the stock market are bear market, bull market, dividend, ask, bid, short, long, calls and puts.
The are many different types of trading, not just 5. These include long-term, short-term, day, swing, and high-frequency trading.