Position Sizing According to Last Ask Price

[Zahi Khamis]

Hi, 

Im trying to set Position Sizing to be according to the asset last ask price

for example if i set the value $1000 and the ask price is $100 then the position size must be 10.

can anyone help with this ? 

thanks

[Keith Watford]

Zahi Khamis:

Hi, 

Im trying to set Position Sizing to be according to the asset last ask price

for example if i set the value $1000 and the ask price is $100 then the position size must be 10.

can anyone help with this ? 

I cannot see any valid and logical reason to base a position size for an instrument on the ask price.

Please correct me if I am wrong.