The three cases in which I divide this experience are: high real volume, low real volume, nonexistent volume.
If you intend to trade a Forex pair for example, always one of the indicators to highlight is the volume and its oscillations.
Operating with a high volume, implies a high level of liquidity at a constant low timeframes but operating with a low volume implies an instantaneous level of liquidity if a part of the market is absent to fight for a position, in this case it is sale and purchase.
In the crypto market, there are usually many pairs that contain false trading volumes, for new traders this is a bit difficult to detect.
You should be aware of the order book and know how it is structured, its walls and large orders that are only filled.