switch(Signal_long)
         {
            case 0: Open[0] > Open[1]; break;
            case 1: High[1] > High[2]; break;
            default: Signal_long;      break;
         }

//=============================================================================================================
// P R U E F E N   O B   O R D E R S   G E O E F F N E T   S I N D
//=============================================================================================================
for(i=OrdersTotal()-1;i>=0;i--){
  if(OrderSelect(i,SELECT_BY_POS)){
    if(OrderType()==OP_BUY&&OrderMagicNumber()==Buy_Market_MN&&OrderSymbol()==Symbol())bool Buy_Mark_inv=true;
    if(OrderType()==OP_SELL&&OrderMagicNumber()==Sell_Market_MN&&OrderSymbol()==Symbol())bool Sel_Mark_inv=true;}}
//=============================================================================================================
// O P E N   O R D E R S
//=============================================================================================================

 if( SPR_AL==true && RT==true && Fast_TF==Slow_TF && Buy_Mark_inv==false && Sel_Mark_inv==false){ 

  if(Buy_Market==true){
    if(CP_1>F_MA&&F_MA>S_MA)OrderSend(Symbol(),OP_BUY,Lots,Ask,Slippage,Buy_Mark_SL,Buy_Mark_TP,Buy_Market_MN,0,MediumBlue);}

  if(Sell_Market==true){
    if(CP_1<F_MA&&F_MA<S_MA)OrderSend(Symbol(),OP_SELL,Lots,Bid,Slippage,Sel_Mark_SL,Sel_Mark_TP,Sell_Market_MN,0,SteelBlue); } }

void Check_Signal_1() 
{  
//if-Statement mit der Signal-Definition
PlaceOrder(OP_BUY, "Signal 1", 111111);
}

void Check_Signal_2() 
{  
//if-Statement mit der Signal-Definition
PlaceOrder(OP_BUY, "Signal 2", 111111);
}

void PlaceOrder(int type, string MyComment, int MyMagicNumber)
{ 
   double price       = Bid,
          sl          = Bid+(SL*pips),
          tp          = Bid-(TP*pips),
          lotsize     = 0;
   
   if(type == OP_BUY)
      {
      price       = Ask;
      sl          = Ask-(SL*pips);
      tp          = Ask+(TP*pips);
      }

//Orderplatzierung
int ticket=OrderSend(Symbol(),type,lotsize,price,30,sl,tp,MyComment, MyMagicNumber,0,clrGreen);
}

extern string DAB1="Distance to";
extern string DAB2="current";
extern string DAB3="Ask / Bid";
extern int Buy_Stop_Dist=64;
extern int Sell_Stop_Dist=64;

extern string SOTS="Stop Orders Trailing Stop?";
input bool Stop_Ord_Trailing_Stop=true;
extern int Stop_Ord_TS_Step=20;

double Buy_Stop_OOP=NormalizeDouble(M_CA+Buy_Stop_Dist*_Point,_Digits);
double Sel_Stop_OOP=NormalizeDouble(M_CB-Sell_Stop_Dist*_Point,_Digits);

if(Stop_Ord_Trailing_Stop==true) {
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
  for(i=OrdersTotal()-1;i>=0;i--) {
    if(OrderSelect(i,SELECT_BY_POS)) {
///////////////////////////////////////////////////////////////////////////////////////////////////////////////

      if(OrderType()==OP_BUYSTOP&&OrderMagicNumber()==Buy_Stop_MN&&OrderSymbol()==Symbol()) {
       
        double BuyStOOP = OrderOpenPrice();

//      
        double BuyStOOP__StopOrdTSS = NormalizeDouble( BuyStOOP + Buy_Stop_Dist *_Point,_Digits);

//
        double BuyStOOP__BuyStopDist__StopOrdTSS = NormalizeDouble( M_CA + Buy_Stop_Dist + Stop_Ord_TS_Step *_Point,_Digits);


        double New_Buy_St_OOP = NormalizeDouble( M_CA + Buy_Stop_Dist *_Point,_Digits);
//

        if(NormalizeDouble( BuyStOOP__StopOrdTSS > BuyStOOP__BuyStopDist__StopOrdTSS *_Point,_Digits))OrderModify(OrderTicket(),New_Buy_St_OOP,B_Stop_SL,B_Stop_TP,0,Maroon);} } }

///////////////////////////////////////////////////////////////////////////////////////////////////////////////
  for(i=OrdersTotal()-1;i>=0;i--) {
    if(OrderSelect(i,SELECT_BY_POS)) {
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
      if(OrderType()==OP_SELLSTOP&&OrderMagicNumber()==Sell_Stop_MN&&OrderSymbol()==Symbol()) {


        double Sel_St_OOP = OrderOpenPrice();


        double SelStOOP__SelStopDist = NormalizeDouble( Sel_St_OOP - Sell_Stop_Dist *_Point,_Digits);

//      
        double MCB__SelStopDist__StopOrdTSS = NormalizeDouble( M_CB - Sell_Stop_Dist - Stop_Ord_TS_Step *_Point,_Digits);


        double New_Sel_St_OOP = NormalizeDouble( M_CB - Sell_Stop_Dist *_Point,_Digits);

//      
         if(NormalizeDouble( MCB__SelStopDist__StopOrdTSS < SelStOOP__SelStopDist   *_Point,_Digits))OrderModify(OrderTicket(),New_Sel_St_OOP,S_Stop_SL,S_Stop_TP,0,Maroon);} } } }

https://www.oanda.com/lang/de/forex-trading/analysis/open-position-ratios