Help with coding tigh trailing stop loss

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Hi, I am trying to complete the code for a tight trailing stop for my EA. The Trailing Stop I currently have is such as that only when the trade is much closer to the TP, is when the actual SL is moved up, but I want to make a trailing stop that stays exactly the same distance from the current price, as the price level moves closer to the TP, any advice would be helpful.


Here is the code:

void OnTick()
  {
   
   for(int i = PositionsTotal()-1; i >= 0; i--){
      
      ulong ticket = PositionGetTicket(i);
      if(PositionSelectByTicket(ticket)){
      
         double bid = SymbolInfoDouble(_Symbol,SYMBOL_BID);
         double ask = SymbolInfoDouble(_Symbol,SYMBOL_ASK);
         double posOpenPrice = PositionGetDouble(POSITION_PRICE_OPEN);
         double posSl = PositionGetDouble(POSITION_SL);
         double posTp = PositionGetDouble(POSITION_TP);
         
         int posType = PositionGetInteger(POSITION_TYPE);
         
         if(posType == POSITION_TYPE_BUY){
            // if(ask - posSl > )
            double possibleWin = posTp - bid;
            double newSl = bid - possibleWin;
            newSl = NormalizeDouble(newSl,_Digits);
            
            if(newSl > posSl){
               if(trade.PositionModify(ticket,newSl,posTp)){
                  Print("Position #", ticket, " was modified by tsl...");
               }
            }
            }else if(posType == POSITION_TYPE_SELL){
            // if(ask - posSl > )
            double possibleWin = ask - posTp;
            double newSl = ask + possibleWin;
            newSl = NormalizeDouble(newSl,_Digits);
            
            if(newSl < posSl  ||  posSl == 0){
               if(trade.PositionModify(ticket,newSl,posTp)){
                  Print("Position #", ticket, " was modified by tsl...");
               }
            }
         }
      }
   }
 

A solution for a long position could be as follows:


double max_quote = (max_quote < current_quote) ? current_quote : max_quote;
double percentage = ((position_TP - max_quote) / (position_TP - open_price));
double stop_out = max_quote - (max_profit * perccentage);

if(stop_out > current_quote)
{ ClosePosition(); }


untested pseudocode but it should give an idea on how it could be approached.

EDIT:

you will need to take measures to track each single positions values according to their parameters. Especially you need to store the value max_quote for each position, or recalculate it every time based on opening time and quote. 

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