Hey, I’m sure you want a clean reversal setup. The one nice setup is where SPY gaps down, shakes everyone out, and then rips higher while the trade looks obvious in hindsight. This idea is actually very simple.
- But how does it work?
- What are the rules?
- And should you even use it? In this article, we’ll find out. Gap Down Only Proves Weakness, Not Exhaustion A gap below yesterday’s low tells you only one thing before the trade: SPY is opening in a weak location. It does not tell you if the sellers are exhausted or the move down is just getting started. Every finished chart becomes too easy to explain.
- Winners get called reversal setups.
- Losers get called obvious warning signs. That is not research. So this test needs to answer the question before the outcome is known: When SPY opens below the prior day’s low, is buying that weak open a repeatable trade, or is it just a pattern that looks better after you already know the close? Below is another candle-related stock market pattern I researched before: Yesterday I made a YouTube video where Codex, Gemini, and Claude Code all got the same RealTest task: write the strategy, run the backtest, optimize it, walk-forward it, and produce the charts. I wanted to see which agent could be the best. The results were pretty interesting.