A lot is the minimum amount of cryptocurrency that can be bought or sold. If these limits didn’t exist, valuing and trading would very hard and time-consuming.
For each trading pair HitBTC has an established lot amount. For example, the BTC lot is 0.01 BTC. This is the minimum amount that can be bought or sold.
For many users it can happen that they own less assets than the lot amount, so they can’t sell them. This situation can be addressed by one of the following options:
You can withdraw your assets or keep them in your account until later; or
You can buy the amount of cryptocurrency that you are short of to make up the lot.