Need help with this part of code mql4

hello...
I need help to code this case :

at certain price I have active orders and pending orders , haw to get the sum of pending orders lots ????

Example :
BUY_STOP with lot 0.1
BUy_Stop with lot 0.3
------------------------------------
Total lot size : 0.4


thanks

Loop through all (non historical) orders; select order and look if order type is above 1 (indicating a pending order);
if so, get order lots and add to existing lot size.

double lots = 0;
for(int i = OrdersTotal()-1; i >= 0; i--) {
if(OrderSelect(i, SELECT_BY_POS) && OrderType() > 1)
lots += OrderLots();
}

thanks So much ..............