Best way to graphically implement a "heat map" for a custom indicator

Hey everyone, 

I am creating a custom indicator where the information output only really makes sense when displayed as a heat map (example attached below). On each iteration, an array of 50 values is generated and I'd like to color the indicator window from range 1-50 on the y-axis according to each corresponding value in the array.

The only way I believe this can be done in MQL5 is to create a separate buffer for each of the 50 values. However, that is far to inelegant for my liking. Does anyone else have any insight into how I can accomplish this in the most efficient manner?

Best,

Joe

So its like a "matrix" type of display and the display has 50 rows per bar always?

Yes exactly, Its a matrix that always displays 50 rows per bar and each value in the matrix ranges between 0 and 1.

I am looking to color the display at each row depending on the value.

Example:

If value is more than .5 color row red or green (color depending on another conditional)

If value is less than .5 color row black

Alright then , the best option is to deploy a background canvas (or memory resource) that you draw to .
Each time the chart changes you redraw it ,getting its size and splitting it to 50rows.
It would be best visually if the heat map was on a separate window since its not relative to the price chart