BarsAgo

An int value representing the number of bars ago of the draw object

Color

A Color structure representing the color of the draw object

Time

A DateTime structure representing the time of the draw object

Y

An int value representing the y value of the draw object

protected override void OnBarUpdate()
{

    // Draws a square
    ISquare square = DrawSquare("tag1", true, 0, Low[0] - TickSize, Color.Red);

    // Print the number of bars ago of the draw object

    Print(square.BarsAgo);
}