If you really wanna wet your noodle, try taking square roots of fibs and plotting those ratios. All of a sudden a whole new series of numbers emerges. Some of which are much more powerful than the first.
Or doubling up the fib amounts. 1,3,5,8,13,21,34,55 now become 2,6,10,16,26,42,68,110.
So far as plotting the high/low, I have come to the conclusion that while you can optionally employ fib ratios to some range and also have harmonic proportion there is a grander scheme at work and grander cycles that are not random. To quote Gann, In order to forecast long term cycles, the most important thing is to start, for if we have the right start, we will find the perfect ending. If we understand the cause of the impact there may be no uncertainty about predicting future event or effect.