One of the main indicators of the market transactions is the Volume of transactions.
The Volume of finished transactions is characterized by an active involvement of participants in the market, its strength and intensity. Volume increases together with a steady uptrend when the price rises, and, hereby, decreases when the price falls. The same happens with a downtrend, the volume increases when the prices fall and decreases as the prices rise. One of the main features of Volume is that it is always a little ahead of price. In forex market, as a rule, there is no way of showing the direct volume of transactions, that’s why an indicator called “Volume”, is constructed, which reflects the number of price changes (ticks) during one bar. This indicator shows the activity of price changes and it is believed that this activity well correlates with real volume of transactions.