A 0DTE (zero-days-to-expiration) option expires today; a 1DTE expires tomorrow. One day apart, but the way they move — and the way they can hurt you — is very different.
0DTE: maximum gamma, brutal theta
At 0DTE, an at-the-money option is almost pure gamma — small moves in the underlying swing the option's value hard, which is the appeal for scalpers. The flip side is savage theta: the premium bleeds fast, and a flat hour can gut a position even when you're eventually right on direction (theta decay). Everything resolves by the close — nothing is held overnight, which is both the discipline and the constraint.
1DTE: a cushion, and overnight risk
A 1DTE option carries more extrinsic value, so theta is slower and a stalled trade has room to breathe (1DTE scalp mechanics). The trade-off is real: you're exposed to overnight gaps, and the gamma isn't as explosive as a same-day contract at the close.
0DTE punishes hesitation; 1DTE forgives it, but charges you overnight risk for the mercy.
How to choose
Trade 0DTE when you want tight, same-day risk with force-flat-by-close discipline and can act decisively on stalls. Trade 1DTE when you want a little cushion and can accept overnight exposure. NoVo makes this an explicit dial — your DTE Target sets the whole risk profile — and the difference in decay is exactly why the two need different exit tempo. See gamma risk on 1DTE and position sizing for 0DTE.
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NoVo is a software tool for market analysis, 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.
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