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Intraday Timing
What Is Power Hour in Trading?
After the midday lull, the market wakes up for one last surge. Power hour is where a surprising amount of the day’s action happens — and where a lot of it goes wrong.
NoVo Options Trading · 2026
Power hour is the final hour of the trading day (3–4pm ET), when volume and volatility surge as institutions position into the close. It’s one of the day’s most active windows.
What drives it
Several forces converge: institutions executing end-of-day orders, charm and gamma hedging intensifying into expiration, MOC imbalances building toward the auction, and traders squaring positions before the bell. After the midday drift, this rush of activity revives volume and movement — sometimes producing the day’s strongest trend, sometimes a violent chop.
Trading power hour
Power hour can offer real momentum moves — but on 0DTE it’s treacherous: maximum gamma, fast decay, widening spreads, and the pin all in play. It’s where experienced traders can find clean trends and where the undisciplined get chopped up into the bell.
Power hour is the market’s second wind — big volume, big moves, and big risk on 0DTE. Trade it with respect or watch from the sidelines.
What it means for a scalper
Read the gamma regime and the imbalance to know whether power hour will trend or pin. Many scalpers are flat by 3pm to avoid the 0DTE close risk. If you trade it, tighten discipline — the last hour rewards it and punishes its absence.
More on this: The Power-Hour 0DTE Playbook: Trading the 3pm Gamma Ramp · Options Buying Power
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NoVo is a software tool for market analysis and for executing trades you initiate, not financial advice. This article is general education, not investment advice. Options trading involves substantial risk of loss, up to and including your entire capital. NoVo makes no guarantee of profit, win rate, or performance, and past results do not predict future outcomes. You are responsible for your own broker account, configuration, and trading decisions.