Using another criteria for evaluation, what will you call this trader?

[justdimin]

There are traders who can trade only one pair, nothing else, if they ever try another, their strategy crumbles because they are not used to the market.

You need to remember that trading strategy is not universal one; it means BTCUSD pair may work as per Fibonacci strategy whereas LTCUSD pair may not; still BTCUSD pair will obey Fibonacci only in 4hr time frame and not in 1hr time frame. So, trading with only one pair makes all the sense to me. At the end of the day, you are making profits or not is the only criteria we need to consider and not about which coin you are trading.

Success is success, you will always be successful if you stick to what’s your best capable of doing is. So if it means trading only on one pair and you make maximum profits from it

Yeah, leaving off the pairs which are not profitable must be a right approach in my opinion as well. Some traders may work on new strategies for unsuccessful trading pairs. If you have time, then you may go for it.

[Roseline492]

The criteria for success in trade is having more profitable trades than losing trades, but if we ignore that criteria, can we use another criteria to evaluate it.

This question seem a little complicated because if I should use your word that a criteria for trading success is the profit there shouldn't be any reason why you should ignore it because the moment that strategy is not use then the profit will also cease. Although I have no idea if you are talking about utilizing different strategies to ascertain the best of course even if I'm not a trader but I no that people has been explaining several strategies but the most important thing is that what you are doing and seeing something everytime is best to manage it because you can change it never see anything again.

[cryptoaddictchie]

What is your opinion on a trader who is only successful trading only one pair well when he tries any other pair he fails woefully, would you still call that trader as successful?

Well being succesful or accurately win on a single pair focus on trading is quite an achievement already. Seriously no need to shift if the ending would make him lose on other pair. Yes he is accepted as trader, it doesnt mean his not trader if he fail other pairing its like he was well verse on any tokens or coins. Its about on how you win if its means you focusing on one coin.

[Maslate]

You don’t have to complicate your trades in order for you to be considered a successful trader. Stick to where you are more suitable and comfortable to trade, where you can maximize profits, that’s the only way where you can avoid some inevitable losses.

However, while you are still making your trades work most often, it’s never a bad idea also to study on the part of trading on which you aren’t that inclined. Do it on your spare time, and you’ll get surprised how your trading potentials increase to its highest level.

[Japinat]

(.....)
What is your opinion on a trader who is only successful trading only one pair well when he tries any other pair he fails woefully, would you still call that trader as successful?

A trader who can consistently make profits from one pair is still successful, even if they struggle with others.
Success doesn't always mean being good at everything; it can mean mastering one thing well.

For me? It's better to be great at one than average at many.

Being successful does not obliged you to be skillful on everything. You can focus on a single craft and master it, and success will eventually follow. In the long run, you don’t have to be consistently profitable with trading to make you successful, as that could be hard though, but you can always trade and avoid major losses, that’s already a good basis that you are heading to becoming a successful trader, even if you aren’t consistently profitable.

[bitgolden]

You don’t have to complicate your trades in order for you to be considered a successful trader. Stick to where you are more suitable and comfortable to trade, where you can maximize profits, that’s the only way where you can avoid some inevitable losses.

However, while you are still making your trades work most often, it’s never a bad idea also to study on the part of trading on which you aren’t that inclined. Do it on your spare time, and you’ll get surprised how your trading potentials increase to its highest level.

Yeah, I agree. I think OP is concerned that trading a single pair might not be efficient in future. But like you said maximize profit while it lasts. Don't overthink and change something that's clearly working for something that's yet to be explored. Money in one hand is better than both hands empty.

If you have such concerns like how the future will shape, you can always invest some time in learning to make sure you always stay ahead of the market and even when your one-pair trading is no longer working, you have something else in your arsenal. Now with AI tools and all these things, you can also automate your trading and spend more time on learning for the future.

[shinratensei_]

Depends if he still make profit and his PnL is positive despite failing on other pair yet excels at one pair he's still successful trader.
In my brain, the definition of successful traders are profitable traders.

if anybody are good at trading various pair yet falls short on monthly or yearly PnL, that success is just illusion because at the end of the day they're just losing. What matters is result.