Comissions after backtes

Beginner Questions
1

Hello guys
I have a question regarding how to calculate comissions aproximately after a backtest.

So lets say that you backtested a system and have the following results:

Trades: 1500
Win /loss ratio: 50%
r/r ratio: 2.00
Period: 2 years
Profit: 300%

HOw much of those 300% goes in comission? 20-30%? So it would accurate to say that a more real profit would be something like 200% after comissions?

thanks

2

That depends. How much is the commission? $15 per lot?

Also, did you consider the spread too?

3

Hi
When I said comission I meant the spread, cause I am using a standard account. If I choose on mt4 backtest spread: Current, then it consider the spread?