Best cheapest commission stock broker for forex please share your personal value


I have an account with FXTM and Olymtrade.

I prefer to trade in futures only. Mainly i trade in EURUSD
Currently i have account with FXTM and Olymtrade

So for me Today i traded in total 15 lots

So total i purchased 15 lots in future and sold 15 lots in future intraday today.

All traded in FXTM only. but So Lost all money in Brokerage only ( Mistake was Mine but All of my capital has running away howdie it possible

So my question is Which broker do you suggest which have cheapest brokerage? Only say the broker which you tested. Because every other broker out there has brokerage calculator on there site but when you start trading with them, they charge are more.