ModifyPosition

 protected override void OnPositionOpened(Position openedPosition)
        {
            position = openedPosition;
           
            if (position.TradeType == TradeType.Buy)
            {
                double? stopLoss = position.EntryPrice - StopLoss * Symbol.PipSize;
                double? takeProfit = position.EntryPrice + TakeProfit * Symbol.PipSize;
                ModifyPosition(position, stopLoss, takeProfit);
            }

            if (position.TradeType == TradeType.Sell)
            {
                double? stopLoss = position.EntryPrice + StopLoss * Symbol.PipSize;
                double? takeProfit = position.EntryPrice - TakeProfit * Symbol.PipSize;
                ModifyPosition(position, stopLoss, takeProfit);
            }

Basically on Stop orders the SL and TP are calculated based on the original submitted price. Now since the slippage may be absurd even 30-50 pips, I've inserted this code in order to modify SL and TP on Stop Orders. 

Sometimes it doesn't work and SL and TP are not modified. is there and error or what?