Quote from milimabuse:
this type of edge is nothing new!
I've seen this live already in the 90ies, only of course it was a well-kept secret (and GS would have loved it to remain one)..
the truth has always been the same, and retail traders always make the same nonsense mistakes:
you cannot consistently make money daytrading. it' s not possible because "a good profitable run" will be wiped out by a "bad losing run".
also: we ran a highly sophisticated backtest a couple of years ago, and guess what:
daytrading trend systems would be profitable if there was no broker commissions (taking 1$ / 100 shares).
the same system with that commission is..of course unprofitable.
also: market makers of course make great money on the backs of retail traders. we ran another interesting backtest: "playing" market maker for a year in stocks like GOOG/BIDU would have gotten us an annual return of >3000%!
so now you can figure HOW CRASS the disadvantage is to retail traders