Volume is the number of contracts/shares traded in a market/security during a specific time period. Volume is a way to measure activity of shares that trade hands from sellers to buyers.
Volume is a key factor in technical analysis and measurement of market move. Big changes is a market price will always be due to high volume.
Volume in algo-trading (With Expert advisor)
Volume as an indicator is crucial when combined in an EA’s strategy. The ability to react based on the volume in the market, can help the trader react before price changes, therefore saving money or making more profit.