Quote:is this maybe misconfiguration by me or it is like some security margin so gekko can be sure the amount is big enough so the order will not be canceled or something?
Yes it is. Some exchanges (for example Binance) have limits on the precision of the amount so it's not possible to trade 100% of your balance. Besides those kind of restrictions there are also safety measures Gekko imposes relating to the price moving quickly around a buy/sell trigger.
What exchange do you trade on?