I'm a newbie, Please help me, Error 4107
Please use this to post code . . . it makes it easier to read.
What is this supposed to do ?
double P = NormalizeDouble( PRICE_CLOSE, 5);
If you look here: https://docs.mql4.com/constants/prices you will see that PRICE_CLOSE has a value of 0 and it's an int
Using a value of 0 for P in this code is probably why you get error ERR_INVALID_PRICE_PARAM (4107)
ticket = OrderSend( Symbol(), OP_BUY, Lot, P, 0, P - SL, P + TP, Com, MagicNumber, 0, Blue); // 0 - SL = -SL which is an invalid price
thanks your support, i'll try
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extern double B = 0.00020; // Breakout points
//+------------------------------------------------------------------+
//| expert start function |
//+------------------------------------------------------------------+
int start()
{
// start here
int i = 0;
int err;
int ticket;
double MAShort;
double MALong;
string Com = "Hoa";
double P = NormalizeDouble( PRICE_CLOSE, 5);
double Spread = MarketInfo(Symbol(),MODE_SPREAD)*Point;
//check orders
for ( i= 0; i < OrdersTotal(); i++)
{
if ( OrderSelect( i, SELECT_BY_POS, MODE_TRADES) && OrderSymbol() == Symbol())
{
// kiem tra cac vi tri, neu co 1 vai lenh da duoc mo, kiem tra chung voi cac indicator
if (OrderType() == OP_BUY)
{
return(0);
}
if (OrderType() == OP_SELL)
{
return(0);
}
}
}
// tính cac giá tri cua System
MAShort = iMA( Symbol(), 0, 5, 0, MODE_SMA, PRICE_CLOSE, 0);
MALong = iMA( Symbol(), 0, 20, 0, MODE_SMA, PRICE_CLOSE, 0);
// Condition for BUY
if(MAShort > MALong)
{
ticket = OrderSend( Symbol(), OP_BUY, Lot, P, 0, P - SL, P + TP, Com, MagicNumber, 0, Blue);
if (ticket == -1)
{
err = GetLastError();
Print("error(",err,")");
}
}
else
{
Comment("\n","Cannot set OP_BUY",
"\n","Khong du dieu kien de vao lenh Buy");
}
// dieu kien cho lenh SELL
if (MAShort < MALong)
{
ticket = OrderSend( Symbol(), OP_SELL, Lot, P, 0, P + SL, P - TP, Com, MagicNumber, 0, Red);
if (ticket == -1)
{
err = GetLastError();
Print("error(",err,")");
}
}
else
{
Comment("\n","Cannot set OP_SELL",
"\n","Khong du dieu kien de vao lenh SELL");
}
}