I only trade one or two markets and my swing trade strategy by backtest is 100 times -1000 times a year.
That is power of focus.
My intraday trading is supposed to be much more profitable but much more difficult and I am experimenting it.
If I switch my intraday trading instrument from ES to NQ on the same strategy, it will be loss instead of winning.Not to mention other market.
For example, intraday trading ES, a following trend strategy usually trade 9:30 am market open when market is the most trending of the day. But sometimes market just goes seesaw for the first 1 or 2 hours. If you follow trend you will be cut back and forth many times and suffer big loss. So when or under what circumstances you should stop trading "the follow trend" strategy? If you focus you will figure out when you can trade and when you can not. But if you trade 160 markets, you will never get a solution. There are many many tricks like this in intraday trading and only you focus you will get your problems solved.
The words like" If I use 10 times leverage I can make more" doesn't make sense.
That means you never optimize your strategy and never research and experiment what is the best leverage for your strategy .
The best leverage is the one that maximize your profit at the same time ensure the survial of your account.