Money management Related, Buy or sell amount setting

[kuja1224]

Dear authors

A important function need to be implement.

About buy or sell a order, we need to select how much amount, or
how many money, or how many volume that I want to buy.

Buy Coin can not just All-in.

It is influence everyone their's money management strategy.

So that, I wish authors can make a flexible amount function please.

[BotsEdge]

I have to double on that one.

Gekko needs the implementation of a moneymanagement system. As a seasoned trader i can say that running up and down any TA based strategy will not produce any serious wins if it is not related to a basic moneymanagement system.