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Market Basics

Volume

The number of shares traded in a given period.

Volume confirms price moves. A breakout on high volume is more reliable than one on low volume. Relative volume (RVOL) compares current volume to the 20-day average — 2x+ RVOL signals institutional interest.
Related Terms
Relative Volume (RVOL)

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More in Market Basics
Candlestick
A bar showing open, high, low, close for a time period.
OHLCV
Open, High, Low, Close, Volume — the 5 data points per candle.
Timeframe
The duration each candlestick represents.
Relative Volume (RVOL)
Today's volume compared to the 20-day average.
Spread
The difference between the bid (buy) and ask (sell) price.
Slippage
The difference between your expected price and the actual fill.