Heatmaps, color gradients and scales in MQL5:
The purpose of this code is to demonstrate how easy it is to create color scales, color gradients and heatmaps with the MQL5 language and functions.
In order to facilitate things, we will work with the RGB color model and the standard conversion function StringToColor.
Other color conversion methods can be implemented in MQL5, however we have decided to use the RGB color model due to the facility to perform mathematical operations on the colors.
Author: Rodrigo Malacarne