How do I look for profitable ClickBank vendors with low gravity?

To look for profitable ClickBank vendors with low gravity, you can use the 'Growing Vendors' feature.

If you order vendors by 'Growing Vendors' -> 'During 60/90 days' and add the filters Gravity >= 2 and Gravity <= 5 (or up to 10), at the top of the results you will get vendors whose products are being sold almost daily by few affiliates. Such products are undiscovered and are selling very well. You will likely have many opportunities to promote them.