Volatility is not constant and not random: it CLUSTERS. Quiet hours beget quiet hours, wild minutes beget wild minutes. Nowhere is this more visible than BTC, which trades 24/7 and routinely does a week of movement in one hour when a compression breaks.
Practical volatility reads
- Compression precedes expansion: a series of unusually small candles is the market coiling. The break is often violent — in either direction.
- After a shock move, expect aftershocks: ranges stay wide for a while. Don't size like it's a quiet market.
- Time of day matters even for crypto: US/EU session overlaps carry more flow than dead Asian hours.
Same setup, different volatility = different trade. In a quiet regime your target is far and your races run long; in a hot regime the same distance is minutes away — and so is your stop.
Round durations in the Sim Challenge float on exactly this: the race ends when price covers the distance, so realized volatility decides whether that's minutes or hours. Feeling the current regime is half of timing your entries.