I am looking for a solution (without using a Qlik Branch extension) to create Risk Heatmaps. I have managed to develop a tool using a pivot table, which dispays the total counts of risks in each grid section.
Depending on what version of Qlik Sense you are using, there is an actual Heatmap chart available in the Qlik Visualization bundle so you don't have to use a 3rd party extension. It will not allow you to overlay points on it.
As far fetched as it may seem you could use a custom map with the 16 cells. It won't display the counts, but would color just like a Heatmap, and you could then have a point layer and a line layer.