# Calculate lot for expert advisor

375

Hello,

I'm struggling with something stupid here, don't know what I'm doing wrong.

I want to trade one lot for every 10000 I have in my account.  So if I have 15000 in my account, the lot  traded should be 15000/10000, and that is 1.5 lots.

This worked in MQL4, but in MQL5 it won't work.  I even normailzed the double to zero decimal places, but it still won't work.  If I don't give it a solid interger value the order won't go through.  Any idea why this won't work ?

Thanks

```double ab = AccountInfoDouble(ACCOUNT_BALANCE);

lot_size = ab / 10000;```
682

Saidar:

Hello,

I'm struggling with something stupid here, don't know what I'm doing wrong.

I want to trade one lot for every 10000 I have in my account.  So if I have 15000 in my account, the lot  traded should be 15000/10000, and that is 1.5 lots.

This worked in MQL4, but in MQL5 it won't work.  I even normailzed the double to zero decimal places, but it still won't work.  If I don't give it a solid interger value the order won't go through.  Any idea why this won't work ?

Thanks

Why do you want to give it a "solid integer value" if the result (e.g. 1.5) is of double type?
12700

You should declare lot_size in double type. Like this:

```void OnStart()
{
double ab=AccountInfoDouble(ACCOUNT_BALANCE);
double lot_size=ab/10000;

Print("lot_size=",lot_size);
}```
See Typecasting
375

Hey, thanks for the help.  I know I must declare the lot size variable as double, I just showed you an example of how I coded it, it was not the exact code.  The fact is it won't work, even the code you now gave me won't work.  At least not in the strategy tester