When shooting in a cross-wind you can use the bubble level to intentionally cant the top limb into the wind to compensate for its sideways push. For example, suppose the wind feels moderate - maybe 10 to 15 mph. Your practice sessions have told you that such a wind requires that you cant the bow a half bubble into the wind. Tip the bow until the bubble is correctly positioned and then aim with the pin dead-on as you normally would. This simple step eliminates the need to guess where to hold at different ranges as the canting bow automatically takes care of this.
Many companies make sights with a bubble level built-in.
Consider one of these next time you buy a new sight. In the meantime you can try one of the after-market styles that attach to the inside of your pin guard, or to your pin slot. When you are shopping for a new bow sight with fiber optics, the durability of the fiber-optic pins becomes one of the greatest concerns. You should look for a sight that has the fiber enclosed to prevent damage and breakage.