Use exisitng balance for position (smart trade)#52

I am missing feature to use existing balance to create trade. For example, on my wallet there is 1 ETH. I do not want to buy more, but I just want to create spot LONG position from my exisitng balance (1ETH) I will set manualy my entry price and than set TP and SL and creat position.

Same as SMART SELL ORDER For existing Assets#48
Please try not to duplicate requests