How i set Stoploss as Points not Pips

Hi Dear,

I want to set stoploss on pending order as points. example i want to set stoploss 15 points mean 1.5 pips, but when i send stoploss value 1.5, cBot open order with stoploss 2.0 it just make as round. 

Example code below:

            double _TPrice = NormalizeDouble((Symbol.Ask + 30 * _Points),_Digits);
            double _SL = _TPrice - StopLoss*_Points;
            double _TP = _TPrice + TakeProfit * _Points;

            Print(StopLoss + "   " + TakeProfit + "   " + _TPrice + "    " + _SL + "   " + _TP);

            if (TotalPendingOrder == 0)
            {
                TradeResult result = PlaceStopOrder(TradeType.Buy, Symbol, 1000, _TPrice, MagicNumber, StopLoss, TakeProfit, null, comment);
            }

My StopLoss  = 1.5 and My TakeProfit = 100.0. example 

Target Price is = 1.12002 and my stoploss should be = 1.11987 but after open pending order 

Target Price is = 1.12002 and StopLoss is = 1.11982 (2Pips)

here the screenshot :

above screenshot you will see my stoploss was = 1.5 but after open pending order stoploss going to = 2.0. why?

how can i set stoploss 1.5 pips 

Please help me