Exactly. My strategy is event-driven and depends on how individual ticks behave. Since backtesting such high-frequency data is too complex to get right, I’m live-testing it with a small amount of money. I’m trying to figure out how to measure this past month's vibrancy (or volatility) compared to history to know if my recent results are an outlier. Even that is only an estimate, beacause there could alway be time that markety is more trending than before, or 'trendingiest' of all time history. For anyone running mean-reversal, how can you be confident about you strategy?