# What's the use of the 1st assignment for lot calculation?

201

It give the "Lots" we entered to lot first, and then give a value to lot again according to account free margin, the previous value is covered by it right? so is that necessary to enter a Lots at the EA start ?

It's from the sample Moving Average EA in MT4 program.

I took course of C programming...and back here again lol..

```input double Lots           =0.1;   //at the ea start, enter the parameter 0.1 here

//and then there is a "lot" in the block following, there are two assignments for"lot", then what's the 1st assignment for?
double LotsOptimized()
{
double lot=Lots;   // the 1st
int    orders=OrdersHistoryTotal();     // history orders total
int    losses=0;                  // number of losses orders without a break
//--- select lot size
lot=NormalizeDouble(AccountFreeMargin()*MaximumRisk/1000.0,1);  // the 2nd
//--- calcuulate number of losses orders without a break
if(DecreaseFactor>0)
{
for(int i=orders-1;i>=0;i--)
{
if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==false)
{
Print("Error in history!");
break;
}
if(OrderSymbol()!=Symbol() || OrderType()>OP_SELL)
continue;
//---
if(OrderProfit()>0) break;
if(OrderProfit()<0) losses++;
}
if(losses>1)
lot=NormalizeDouble(lot-lot*losses/DecreaseFactor,1);
}
//--- return lot size
if(lot<0.1) lot=0.1;
return(lot);
}```

Thank you for help!

Moderator
5550

Not nessesary because the value gets overwritten anyway.
201

Marco vd Heijden:
Not nessesary because the value gets overwritten anyway.
Thanks.....I'm not confidence about my programming ability - -! thank you.