Thanks, and good question. Let's say we are looking at a markup that has retraced down to this fib "zone", looking at the 5 min for entry.
First thing we know is, a NS entry wouldn't be very close to the 61.8 level since we would need to see stopping volume there, no close below 61.8, and price to move away from the low first.
So the question is, is a NS valid within this zone? Sure, that's a trade I'll take. In my experience, waiting for price to get back OUT of this zone before entering is probably slightly safer.
Just note, it's always best to see a general increase in volume maintained as long as price is in this zone to suggest a bounce...besides the NS/ND candles of course.