Progression to me equates to establishing better odds, weapon of choice is irrelevant. I think my opinion is quite straightforward - a pro trader should be able to derive profit trading a chart.
Now that's clear...a pro trader "should be" but the reality is that someone that already is successful professional trader via a particular trading style (e.g. algorithms, fundamentals, statistical analysis, spreads, bid/ask screens or whatever) is not going to switch to chart analysis when their firm has not trained them to do such nor approved such. For example, someone hired as a quant and to design algorithms isn't going to be caught at his/her desk doing chart analysis because they'll obviously be at risk of losing their job.
Simply, to a professional trader that you believe "should be" will not be allowed unless of course he/she quits her job and become a private trader or finds a new job and then takes a new position that involves chart analysis (not reality).
The above is the reason why I asked in a prior reply if you're talking about retail traders or professional traders because you're "should be" comment is not applicable to professional traders because they are hired to do a particular job and if they decide to do something else...they get fired or maybe reprimanded with a warning to do what they were hired to do.
In contrast, its common to hear about a retail trader switching trading styles, switching trading models, switching trading instruments without needing anyone's permission unlike a professional trader. That's more of a reality. For example, we have many journals or threads were someone says they were profitable with fundamental analysis or profitable with bid/ask screens or profitable at whatever and are now asking for advice because they're switching to chart analysis. I usually respond "don't switch"...keep doing what works for you because the goal is to be profitable and you already found a way to be such.
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