If you're saying that every trader has a 50% chance of winning every trade they put on, they it's total garbage.
If that were true, all of us could make money by having a risk-to-reward ratio of 2:1 and only betting 1% of our total account on each trade and we'd all make money, even if we lost 10 trades in a row.
And that would be without the use of any technical analysis.
It's total BS.
A winning strategy can have a less than 50% win rate!