When I used this method to do healing, I used to look for a decent pace and nice round solid swings, I would be more worried about wobbles in the rotation than the speed, unless it’s excessively slow which could indicate stagnant energy.
You’ll soon start to see any clogged bits of energy, I used to see them as like beigey-brown clouds in the whirlpool of healthy normal “clear” energy at those points, and you can literally scoop them out (just intend to do it) and bind them into a bowl of water (put your hand in and intend the gunge to stay there - throw the water out under a bush, or at a pinch flush it down the lavatory, but don’t allow animals to drink it, and houseplants are usually too small and feeble to absorb and transmute the gunge).
Ideally you’re looking for a nice round clockwise swing, anything too wide where the pendulum almost swings out means the energy’s too fierce, anything too tight and there may be a tension in that chakra which could have phsyical and emotional ramifications, and loosening up the spiral will help with that (go easy, don’t do too much in one session because you’ll be overwhelmed and out of balance in a new and different way, which is no use at all).
You can spin a wobbly, tight, or sluggish chakra with your hand in the way a DJ spins a deck with a record on, again intention’s the key, and you’ll soon start to feel the energy in a really tangible way, and yes you’re bound to wonder if it’s just in your mind but when you and other people start feeling results, you’ll know it’s not.
I trained in this stuff and there are probably other methods, those are just the ones I used and I got some very favourable and lasting results from the people I healed.