5 ms·

This paper is a hilarious dump of WQ's randomly generated formulas that (hopefully) happen to pass in-sample test. Alpha#33: rank((-1 * ((1 - (open / close))

This paper is a hilarious dump of WQ's randomly generated formulas that (hopefully) happen to pass in-sample test. Alpha#33: rank((-1 * ((1 - (open / close))^1))) This formula trivially reduces to rank(open/close - 1) which is an example of a mean-reversion strategy. But: 1) nobody bothered to simplify this formula, 2) as any mean reversion, it is extremely difficult to trade.

astrofinch 6y ago
Why is mean reversion difficult to trade?
- young_rutabaga 6y ago
  High turnover, high costs. You flip your position too often
  - stainforth 6y ago
    If the market flips against me, I just double my bet on the next play.
    - vecter 6y ago
      That's a great way to go broke very quickly.
      - anjc 6y ago
        Only if you don't have infinite money on the side, in which case it's guaranteed to be profitable
        rsecora 6y ago
        Martingala with transaction costs are not profitable.
        WJW 6y ago
        You also need the other side of your trades to have infinite money. But in any case, why are you trading at all if you already have infinite money?
    - dkersten 6y ago
      the market can stay irrational longer than you can stay solvent Martingale is a sure-fire way to lose all your money rather quickly.