Would appear that setting ForceMaximumBarsLookBack256=true in Initialize() prevents an indicator added by a strategy from plotting. Even if the number of bars in the chart are less than 256 ! ?
In code below mySMA is standard SMA except that Overlay has been set to false:
protected override void Initialize()
{
ForceMaximumBarsLookBack256=true;
mySMA(10).Plots[0].Pen.Color = Color.Orange;
mySMA(10).PanelUI = 3;
mySMA(20).Plots[0].Pen.Color = Color.Green;
mySMA(20).PanelUI = 4;
Add(mySMA(10));
Add(mySMA(20));

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