The forex market is open 24 hours a day, but not all hours are created equal. There are certain times when the market is more active than others, and these are the times when you are most likely to find profitable trading opportunities.
The three major trading sessions are London, New York, and Tokyo. These sessions overlap, so there is always some level of activity in the market. However, the most active times are when two or more sessions overlap.
For example, the London and New York sessions overlap from 7:00 AM to 1:00 PM EST. This is the most active time of the day, and it is when you are most likely to find good trading opportunities.
If you want to trade currency pairs like EUR/USD, GBP/USD, or USD/CHF, you will find more activity when both Europe and the United States are active. This is because these pairs are most heavily traded during these times.
Of course, other factors can affect market activity, such as news releases and economic data. However, the trading sessions are a good starting point for understanding when the market is most active.