Original title: Retail Trader's Ruin: An Anatomy of Popular Signal Failure
Adam Darmanin · July 2026
Many popular trading strategies promise everyday investors reliable profits, but do they really work? Researchers tested five famous retail signal families: trend, oscillator, candlestick, volume, and calendar rules. To see if these strategies genuinely work, the researchers set up three strict hurdles. A strategy had to show a real statistical edge after correcting for lucky guesses, make money after subtracting trading costs, and survive without going broke under borrowed money, known as leverage. Not a single strategy was supported. Four of the six tested candidates—oscillator, volume, calendar, and candlestick rules—were completely refuted because they failed to deliver meaningful statistical or economic results. Meanwhile, trend rules and a momentum benchmark were inconclusive; their results were too uncertain at this sample size to resolve. Finally, while running out of money was not the main problem under standard US rules, higher European leverage caused trend and oscillator strategies to fail.
Imagine trying to follow a fitness plan you found online. You do the exercises, but you don't see results because the plan ignored that you can't skip rest days or eat junk food. Over time, you waste effort and might even injure yourself. In this paper, popular trading rules are like that fitness plan: they look good, but when tested with realistic trading costs, statistical corrections, and the risk of losing your entire investment, most are found to be ineffective.
Retail traders often follow widely promoted signals like trend or candlestick patterns. This paper shows that under realistic trading conditions, none of four major signal families provide a profitable edge after costs and leverage. Traders should be skeptical of these strategies, as even the strongest candidates remain unproven.
The study does not support any signal family, but sample size limits precision for trend and momentum, leaving them inconclusive. Results are conditional on specific US and EU margin scenarios. The analysis is restricted to US equities and a single time period; other assets or periods may differ. Combined signals or dynamic strategies are not tested.
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Retail Trader's Ruin: An Anatomy of Popular Signal Failure — Adam Darmanin
Abstract licence: CC0
Explanation generated by Synthesis from the abstract — it is not the original paper. This is a preprint, so it hasn't necessarily been peer reviewed.