Kesalahannya apa Zis koding EA dicompile muncul pemberitahuan return value of 'OrderSend' should be checked

Zis kesalahannya apa ya, coding EA saya compile kok muncul tulisan return value of 'OrderSend' should be checked, lihat gambar dibawah ini!

Yang kami tanda panah merah Zis.

Coding EAnya dibawah ini lho Zis:

//+------------------------------------------------------------------+ //| Buy Saja.mq4 | //| Copyright 2018, Widodo. | //| http://kursusforexdisolo.com | //+------------------------------------------------------------------+ #property copyright "Copyright 2018, Widodo." #property link "http://kursusforexdisolo.com" extern string Nama_EA = "Buy Saja"; extern int TP = 11; extern int SL = 100; extern double Lots = 0.1; extern int Magic = 69; //+------------------------------------------------------------------+ //| expert initialization function | //+------------------------------------------------------------------+ int init() { //---- //---- return(0); } //+------------------------------------------------------------------+ //| expert deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- //---- return(0); } //+------------------------------------------------------------------+ //| expert start function | //+------------------------------------------------------------------+ int start() { //---- if(OrdersTotal()==0){ OrderSend(Symbol(),OP_BUY,Lots,Ask,3,Ask-SL*Point, Ask+TP*Point,Nama_EA,Magic,0,Blue); } //---- return(0); } //+------------------------------------------------------------------+
Itu apa ya Zis maksudnya muncul tulisan return value of 'OrderSend' should be checked itu? terus cara memperbaikinya gimana ya? rule EAnya hanya transaksi buy saja.