Parameters

tag

A user defined unique id used to reference the draw object. For example, if you pass in a value of "myTag", each time this tag is used, the same draw object is modified. If unique tags are used each time, a new draw object will be created each time.

bar

The bar the object will be drawn at. A value of 10 would be 10 bars ago.

y

The y value

color

The draw object color (reference)

// Paints a red triangle pointing up on the current bar 1 tick below the low
DrawTriangleUp("tag1", 0, Low[0] - TickSize, Color.Red);