I've made a map, with markers on all of are accounts their locations, >1000 so I used fluster pretty cool library. Now I want to draw an overlay showing their value to us. My idea is to make an overlay where the "hot spot" would be the account with the highest value while the "cold spot" would be the account with the lowest value. Does anyone know of a library out there that would be able to do this, or the best way to implement something like this.