A simple drawing tool used to draw rectangles on a chart. Typically it is used to highlight areas of interest.
In Style property dialog it is possible to change the appearance of a rectangle drawn:
Sets the color of the border as well as its thickness.
Toggles the visibility, color and opacity level for the rectangle background.
In Coordinates properties dialog you can set precisely the position of the rectangle's points on the price scale (by setting the price) and the time axis (by setting the bar number):
Allows for the precise placement of the rectangle's first point (Price 1) using a bar number and price.
Allows for the precise placement of the rectangle's second point (Price 2) using a bar number and price.
In visibility properties dialog you can switch the Rectangle tool displaying on charts of different timeframes:
If you wish to draw a square, hold the Shift key pressed while drawing: