The wind indicator I use with my Slo v is when I set the plane on the ground and the wind flips it over then it is too windy to fly and have fun. Yes I can fly it but not much fun.

Things I have done to make mine fly better in the wind are.

7 cell parkzone j3 cub battery
gws 1180 prop
clipped the wingtips back 2 inches(shorten wing span).
Move wing all the way back

Things I have tried that work ok are.

Cover the bottom of the wing with cling wrap to create a flat bottom wing rather then an undercambered wing. It worked well but the cling wrap would stretch after time then start to rip.

I might cut some wing ribs from thin sturdy board and cover the wing with Solite film, reduce dehidreal and add ailerons.