/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
double averageValue = 0;
if (Smoothed)
{
averageValue = smoothedAverage[0];
}
else
{
averageValue = average[0];
}
double offset = 0;
if (Smoothed)
{
offset = NumStdDev * smoothedVolatility[0];
}
else
{
offset = NumStdDev * volatility[0];
}
if (showMidband)
{
Middle.Set(averageValue);
}
else
{
Middle.Reset();
}
if (showChannels)
{
Upper.Set(averageValue + offset);
Lower.Set(averageValue - offset);
}
else
{
Upper.Reset();
Lower.Reset();
}
if (CurrentBar < Math.Max(Period, StdDevPeriod))
{
return;
}
if (FirstTickOfBar)
{
neutralSlope = threshold * averageTrueRange[1] / 1000;
priorBull = bullish;
middle = Middle[1] + Middle[2];
upper = Upper[1] + Upper[2];
lower = Lower[1] + Lower[2];
}
if (2 * averageValue > middle + 3 * neutralSlope)
{
PlotColors[1][0] = upColor;
if (useCentralSlope)
{
PlotColors[0][0] = UpColor;
PlotColors[2][0] = UpColor;
}
if (priorBull <= 0)
{
index = CurrentBar;
}
if (Opacity != 0)
{
DrawRegion("bollinger" + index, CurrentBar - index + 1, 0, Upper, Lower, Color.Transparent, UpColor, Opacity);
}
bullish = 1;
}
else if (2 * averageValue < middle - 3 * neutralSlope)
{
PlotColors[1][0] = DownColor;
if (useCentralSlope)
{
PlotColors[0][0] = DownColor;
PlotColors[2][0] = DownColor;
}
if (priorBull >= 0)
{
index = CurrentBar;
}
if (Opacity != 0)
{
DrawRegion("bollinger" + index, CurrentBar - index + 1, 0, Upper, Lower, Color.Transparent, DownColor, Opacity);
}
bullish = -1;
}
else
{
PlotColors[1][0] = NeutralColor;
if (useCentralSlope)
{
PlotColors[0][0] = NeutralColor;
PlotColors[2][0] = NeutralColor;
}
if (priorBull != 0)
{
index = CurrentBar;
}
if (Opacity != 0)
{
DrawRegion("bollinger" + index, CurrentBar - index + 1, 0, Upper, Lower, Color.Transparent, NeutralColor, Opacity);
}
bullish = 0;
}
if (!useCentralSlope)
{
if (2 * averageValue + 2 * offset >= upper + 3 * neutralSlope)
{
PlotColors[0][0] = UpColor;
}
else if (2 * averageValue + 2 * offset <= upper - 3 * neutralSlope)
{
PlotColors[0][0] = DownColor;
}
else
{
PlotColors[0][0] = NeutralColor;
}
if (2 * averageValue - 2 * offset >= lower + 3 * neutralSlope)
{
PlotColors[2][0] = UpColor;
}
else if (2 * averageValue - 2 * offset <= lower - 3 * neutralSlope)
{
PlotColors[2][0] = DownColor;
}
else
{
PlotColors[2][0] = NeutralColor;
}
}
}
