hi can somebody tell me how to stop sending multiple orders for given condition by an ea at a time ...code ?

The mql4 forum will be a better place for you to search answers about all mql4 related queries.
Check mql4 tutorials 30 episodes on youtube...quite nice tuts.

For your query....you need to check open orders if any before opening orders using a custom function like one below.

 

Code

int OpenOrdersExist(string pair) { int total=0; for(int i=OrdersTotal()-1; i>=0;i--) { OrderSelect(i,SELECT_BY_POS,MODE_TRADES); if(OrderSymbol()==pair) total++; } return(total); }

The above function counts open orders if any and returns the value as integer.

Then

 

Code

if (OpenOrdersExist(Symbol())==0) { //your entry algo here. }