[morgante]

What does "do the opposite of day traders" entail?

If it's to not trade daily then yes, having a profitable strategy is trivial: just buy index funds.

If you think it's possible to reliably trade better than day traders, you're probably just as deluded as them.

That being said, this data set is unlikely the be representative. The best traders are using something like IB, not eToro.

[thomasrossi]

No, I was just pointing out that 80% is not very likely and is probably some sort of bias or mis-representation. In fact it would be a great compliment for them because they would be getting consistently the opposite of the market (If they overall lose money it must be that at least on the weighted average of their bets they get it wrong, maybe one big wrong and many little right ones, or mostly all moderately wrong, etc..).