Draw.Ray(this, "rayL", 1, Low[1], 0, Low[1], Brushes.Red, DashStyleHelper.Solid);
Hint: It does not like DashStyle or DashStyleHelper
These work fine:
Draw.Ray(this, "rayH", 1, High[1], 0, High[1], Brushes.Red);
Draw.Ray(this, "rayL", 1, Low[1], 0, Low[1], Brushes.Red);

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