I guess for me, I don't put to too much emphasis on the absolute top and bottom, if the chart looks very choppy (spiky) like the one in your example. Then, working backwards, I will lay the fib grid out such that the stubborn resistance level matches up with 62% resistance to track the C-wave. I think that's what you've done? Similarly, if the sp finds repeated support in a trend, I'll try to match it up 62% support, it's remarkable how often it matches up down to half a pip.
Same as yourself, I'm generally a medium to long term holder, with occasional day trades on news.
