Map charts - how to hide some point with specific value?

Hello,

i need some help with map charts. I have data about costumers consumtion in table "KWH", and i need to show them in map chart.

I have it almost done. What i need is to hide data in map, which are higher then 6000

here is a condition what i use:

• if(KWH<6000,KWH)

Thanks for any advice.

Radek