I have rose quartz pendulum and I take care of it. It is always charged on full moon even if I didn't use it.
When I do use it, it is always after my meditation,I ask for answers to come from the highest good only and I give my thanks. The thing is that it doesn't move in big circles or big swings. Why is that? Every time I ask yes/no questions it moves so slowly. And before I start I always ask if it can answer some questions for me..if it points to no(it happened only once),then I don't ask anything.
I even asked if it feels charged enough and always says yes.

What kind of chart should I use or what to do,to have better swing?