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Yes, it is very easy to turn trading into a gambling game and it will depend on the trader's attitude to trading. And if a trader does not adhere to a trading strategy, violates risk management, then such trading will be comparable to casino, where the result depends on luck, not knowledge.
Without skills and knowledge - trading is definitely called gambling.
Traders don't rely solely on price volatility, even though it's what can generate profits. Analysis is necessary and they need to study several indicators to determine the best time to buy. Traders who are called gamblers rely solely on luck - meaning no analysis, just buying randomly and waiting for the results. So I have to agree that traders and gamblers are fundamentally different.
Trading is hugely dependent on luck. Doesn't matter how much analysis you make, if you are not a whale or if you are not lucky, then you won't make it. I've been in situations where I've really done a very good analysis of the market but the price somehow went significantly up or significantly down and this led me to huge loss on futures market (I know that I shouldn't trade on futures, especially with increased leverage with long or short positions).
I changed my attitude and now I only trade few times in years. Trading has a very simple rule, buy low sell high. I am very patient and I wait enough to buy low, then I wait enough to sell high and when I am not 100% confident, I don't touch anything and wait for months to catch the best moment, that's how I've been very profitable in the last few years.