How would I use tracking data to keep an object above a pointed finger, & relative to direction? CS6

I am trying to animate something floating above someone's fingers as they talk, and have it constantly pointed at (Or straight down the line of the pointing direction)

for instance if someone put up an index finger the #1 would appear straight out from it, and then two fingers and the #2 would appear from above the second finger, etc...

Would it be easier to track two points on the finger? Or use Mocha to track and somehow get position data from 2 points?

Either way, how would I keep the object relative to the direction of the finger?

Thanks all!