The so-called "Insider Brother" in ETH, I can't say much about his background, but his exchange identification is basically confirmed.

Over the past six months, both of these Insider Brothers have exhibited a strange commonality: during the oscillation period before a major Side, they always manage to precisely hit the point for Profit. Every time they enter the market, they do so at extreme levels—yet they deliberately avoid the points where they would get liquidated—that's the real reason he's called "Insider," not just because of his high Win Rate, but because of that almost inhuman level of precision.

When you see his Side is very steady, and think copying him for a guaranteed profit is no problem...

When a real major Side arrives, the style suddenly changes. He goes all-in in the opposite direction, crazily increases position, and then—bam, gets liquidated right in front of you.

Everyone who understands this pattern knows what’s going on.