public decimal Calculate(Candle candle)
{
if (Candles.Count == 0)
Candles.Add(candle);
if (candle.OpenTime != Candles[Candles.Count - 1].OpenTime)
Candles.Add(candle);
else
Candles[Candles.Count - 1] = candle;
_prevValue = _ind.GetCurrentValue();
if (Candles.Count < 3)
return _prevValue;
if (Candles.Count == 3)
{
_longPosition = Candles[Candles.Count - 1].HighPrice > Candles[Candles.Count - 2].HighPrice;
var max = Candles.Max(t => t.HighPrice);
var min = Candles.Min(t => t.LowPrice);
_xp = _longPosition ? max : min;
_af = _ind.Acceleration;
return _xp + (_longPosition ? -1 : 1) * (max - min) * _af;
}
if (_afIncreased && _prevBar != Candles.Count)
_afIncreased = false;
var value = _prevValue;
if (_reverseBar != Candles.Count)
{
_todaySar = TodaySar(_prevValue + _af * (_xp - _prevValue));
for (var x = 1; x <= 2; x++)
{
if (_longPosition)
{
if (_todaySar > Candles[Candles.Count - 1 - x].LowPrice)
_todaySar = Candles[Candles.Count - 1 - x].LowPrice;
}
else
{
if (_todaySar < Candles[Candles.Count - 1 - x].HighPrice)
_todaySar = Candles[Candles.Count - 1 - x].HighPrice;
}
}
if ((_longPosition && (Candles[Candles.Count - 1].LowPrice < _todaySar || Candles[Candles.Count - 2].LowPrice < _todaySar))
|| (!_longPosition && (Candles[Candles.Count - 1].HighPrice > _todaySar || Candles[Candles.Count - 2].HighPrice > _todaySar)))
{
return Reverse();
}
if (_longPosition)
{
if (_prevBar != Candles.Count || Candles[Candles.Count - 1].LowPrice < _prevSar)
{
value = _todaySar;
_prevSar = _todaySar;
}
else
value = _prevSar;
if (Candles[Candles.Count - 1].HighPrice > _xp)
{
_xp = Candles[Candles.Count - 1].HighPrice;
AfIncrease();
}
}
else if (!_longPosition)
{
if (_prevBar != Candles.Count || Candles[Candles.Count - 1].HighPrice > _prevSar)
{
value = _todaySar;
_prevSar = _todaySar;
}
else
value = _prevSar;
if (Candles[Candles.Count - 1].LowPrice < _xp)
{
_xp = Candles[Candles.Count - 1].LowPrice;
AfIncrease();
}
}
}
else
{
if (_longPosition && Candles[Candles.Count - 1].HighPrice > _xp)
_xp = Candles[Candles.Count - 1].HighPrice;
else if (!_longPosition && Candles[Candles.Count - 1].LowPrice < _xp)
_xp = Candles[Candles.Count - 1].LowPrice;
value = _prevSar;
_todaySar = TodaySar(_longPosition ? Math.Min(_reverseValue, Candles[Candles.Count - 1].LowPrice) :
Math.Max(_reverseValue, Candles[Candles.Count - 1].HighPrice));
}
_prevBar = Candles.Count;
return value;
}