Sounds as if you have found something!
The only way that you can see everything that you are doing is to take video of your strokes.
Some of the recent DSLR cameras have 60p fps and can set shutter speed manually. For the forehand stoke always video in direct sunlight and use the highest ISO and fastest shutter speed available to minimize motion blur. 60fps is very useful for ground strokes but high speed video (240 fps) is much better.
Some of the Smartphone cameras might also do 60fps and have fast shutter speeds in bright sunlight.