MQL4 help needed on placing orders

Hello,

I am trying to learn Mql4. Since i have no practice in any other programming languages learning mql4 is not so easy. I am practicing some basic stuff and simple codes for now and i have one problem.
I have created simple code with simple buy and sell criteria. When fast EMA crosses slow EMA program must send buy or sell order.
It does that and it ok but whet it gets to TP or SL and orders is closed program opens another order after that.
I want the program work this way:
after opening and closing Buy order program must wait until it meets sell criteria and then open sell. After clossing sell visa versa.
Maby it could be done with "For" loop and OrderSelect() or with bool variables setting on order opening but since my knowledge is poor yet i need some advices.
Any help would be weary thankfull
Thanks in advance!
The code example:
//+------------------------------------------------------------------+
//| Bandymas.mq4 |
//| Copyright 2011, MetaQuotes Software Corp. |
//| http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright 2011, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net"

extern double Lots = 0.1;
extern double StopLoss = 12;
extern double TakeProofit = 15;


// Trend type (Bull or Bear)
//------------------------------------------------------------------
string Trendas ()
{
double MAtrend;
double MAsignal;
string TrendType;
MAtrend = iMA(NULL,0,50,0,MODE_EMA,PRICE_CLOSE,0);
MAsignal = iMA(NULL,0,20,0,MODE_EMA,PRICE_CLOSE,0);
if (MAsignal>MAtrend)
{ TrendType = "Bull"; return (TrendType);}
if (MAsignal<MAtrend)
{ TrendType = "Bear"; return (TrendType);}
}

string CheckBuy()
{
string Trend = Trendas();
if (Trend=="Bull") return ("Bull");
}

string CheckSell()
{
string Trend = Trendas();
if (Trend=="Bear") return ("Bear");
}

//-----------------------------------------------------------------------
int start()
{
bool AllowTrading;
int Total = OrdersTotal();

if (Total<1)
{
AllowTrading=true;
}
else
{
AllowTrading=false;
}

if (CheckBuy()=="Bull" && AllowTrading==true)
{
OrderSend(Symbol(),OP_BUY,Lots,Ask,3,Bid-StopLoss*Point,Ask+TakeProofit*Point,0);
}
if (CheckSell()=="Bear" && AllowTrading==true)
{
OrderSend(Symbol(),OP_SELL,Lots,Bid,3,Ask+StopLoss*Point,Bid-TakeProofit*Point,0);
}


return(0);
}

The program is merely doing what you've told it to do.

Because your specifics of when to open a trade are very vague the system will trade alot. The signal you have will either be BULL or BEAR which means either short or long all the time as long as you don't have a trade open.

So what you need to do is to define what it means to be "flat" or no position. What are the specifics of your system that would require neither a buy or a sell position?

Because if you merely mitigate it by time, number of days or what ever there really isn't much value in that of keeping you out of times when you shouldn't be trading.

You already have the switching set up to allow or not allow trading... but your bracketing is a little out of place IMHO. See example.


Something better...


Hopefully this is enough to get you going again.