Pivot Points calculation for bot

Hi,

I am creating a bot for pivot points, calculations are correct, but something is not working correctly because in backtest (timeframe: D1) it gives different takeprofit values.

Follow the code:
 

private void ExecuteStrategy()
{
    var Daily = MarketData.GetSeries(TimeFrame.Daily);
    var High = Daily.High.Last(1);
    var Low = Daily.Low.Last(1);
    var Close = Daily.Close.Last(1);

    var Price = (Symbol.Ask + Symbol.Bid) / 2;

    var Pivot = (High + Low + Close) / 3;
    var R1 = 2 * Pivot - Low;
    var S1 = 2 * Pivot - High;

    var TakeProfifBuy = R1;
    var StopLossBuy = TakeProfifBuy / StopLossFactor;

    var TakeProfifSell = S1;
    var StopLossSell = TakeProfifSell / StopLossFactor;

    if (Price > Pivot)
       {
       ExecuteMarketOrder(TradeType.Buy, Symbol, VolumeInLots, Label, StopLossBuy, TakeProfifBuy);
       }
    if (Pivot > Price)
       {
       ExecuteMarketOrder(TradeType.Sell, Symbol, VolumeInLots, Label, StopLossSell, TakeProfifSell);
       }
}

On August 15, 2017 we do the calculations on the 14th:
> High: 109,798
> Low: 109,048
> Close: 109,653

> Pivot: 109,500
> R1: 109,951
> S1: 109,201

Why give me take profit on 111,756 instead 109,500?

Any Help ?
Thank you