I doubt that it matters much, if at all. Some "pros" use Fib, some don't. Some use pivot points, some don't. Some use MACD, stochastics, MAs, trendlines, Level II, time&sales, blah, blah, blah. Some don't. Some don't even use charts.
But given the reported performance statistics of "professionals", what matters is not so much that you emulate them but that you have and follow a consistently profitable trading strategy. Whether or not that intersects with what a "professional" is doing is largely beside the point.
You can plot Fib, of course. And pivot points. But don't forget Bollinger Bands. And MAs. And trendlines. And the various channels and envelopes. Eventually you'll end up with something like this: