When you see error '51020 order amount should greater than the minimum available amount' in your trading bot on OKX, it means that the order you are trying to place falls below OKX's minimum trade amounts.

Check the minimum trade amounts per trading pair via this link.

Below is an example of the error you see in your trading bot output:

04/18/2024 1:22:34 PM ERROR Error placing buy order, data: {"error":"{\"code\":\"51020\",\"message\":\"Order amount should be greater than the minimum available amount\"}"}