I find fibs interesting too but can be difficult to use. I am liked your chart above but I don't understand how you worked out it would be 100% retracement. Hopefully with practice I can master them
I worked out the 100% retracement was a serious POSSIBILITY, even PROBABILITY, because after I drew the Fib levels to match the high (as 0%) and the low (as 100%) of the spike retracement in September (see chart above), I could see the market had already exceeded the 61.8% Fib level and was looking determined to go all the way to 100% Fib level.
It is not that hard when you just draw on the chart and see correlations between the Fib levels and levels of S/R on the mid-high timeframes. There are Fibs within Fibs, so you can see what I mean if you take most (almost all) fx pairs and just draw.
Maybe it takes 'some' practice, but it really is not that hard. Don't believe the experts that tell you to buy their course because 'trading is a science', or they have worked out some secret. Trading is not really so hard. They just make it out to be to make themselves look like 'experts'.