Excuse me:How to calculate the volume of the last two on the Tick?

[wxn2014]

void OnTick()
 
{
       prevolume=curvolume; 
       curvolume = SymbolInfoDouble(_Symbol,SYMBOL_SESSION_VOLUME);
       Print(curvolume-prevolume);
     

)

I use the above method, print out is zero, the result of the method error? How to calculate the difference of two Tick volume?

[Sergey Golubev]

Forum on trading, automated trading systems and testing trading strategies

When you post code please use the CODE button (Alt-S)!

Thank you.

[wxn2014]

Sergey Golubev:

ok