Fluke, I am always on line (benefit of broadband)
For what it is worth I use the intra-day highs/lows with the all the caveats, that come from Market Profile, about using the least accepted prices.
Which is more accurate? Honestly, I do not know.
I use Fib levels not as absolutes, but to warn me where I might expect to see some reaction to price. But please remember nothing is valid until confirmed by price action.
However, I use Fibs in the context of where the overall trend is going. Old adage of going with, not against, the trend.
The real pro on this subject is Bonsai, I am just a student of the master. I am constantly trying to improve/learn. On going process.
Hope this useful.