The financiers have a saying: if you see a banknote lying on the floor at the station, it seems to you. This is either some kind of joke, or divorce, since a real banknote cannot lie on the floor in such a place. Safer, surprisingly, go past it.
So here's the thing., if you found a trading system on historical data, which is very good (from the series one hundred percent annual profit, drawdown ten percent), - just right to remember about that banknote. Why would I lay it down for everyone to see?
Everything is not very bad, what i found, eventually either broke rapidly, or, more often, it just seemed. Methods of illusion are different. Underestimating transaction costs, when almost all the profit was consumed by slippage. Overestimation of my own speed - I simply would not have time to make those super trades in reality, but not on tests. Yes, just fitting on a period.
With a profit factor 1,5, which almost everyone, I know, despise (in other words, one and a half rubles in profitable transactions, one ruble in unprofitable ones). With multi-month drawdowns. Come up with a real dumb system, without fitting - you need to be able to, by the way.
However, it is clear, why such a system is long-lived. Since it is routinely painful for most people to trade. Since the entrance and exit are blurry, no clear signal, you can climb through this window for a relatively long time, a means, difficulties with solvency will not cover you. In other words it's clear, why hundreds of millions of rubles would be included in this. And hundreds of millions of dollars, by the way, still no - and this explains, why such systems were not crushed by a single superfund. Funds do not need such a sandbox.
In other words, this almost free banknote, but still lying in the bushes (they don't see everything), in a mud puddle (not everyone is ready to get dirty), and not so big according to merit (not many people need it).
And if you meet hunting tales about wonderful profit-reasons and risk / efficiency… I saw a fable about the profit factor 10 on the euro-dollar pair. It's not even infogypsy, this, Fear, man is just not inside himself.
The phenomenal rule goes like this.
Oh so that banknote in the bushes.
