Selling premium sounds straightforward as theory. Collect the credit, let theta work, and you don't necessarily need a huge directional move.
With 0DTE, though, the same short expiration that gives you fast theta decay also gives you much more sensitivity to a sudden move.
The chart is an example of the type of setup where I'll at least consider selling premium.
SPY is moving sideways after the earlier push. Candles are overlapping, the shorter EMAs are compressing, and price keeps rotating through the same area rather than extending in either direction.
In that situation, I'd rather sell premium than pay for a directional option if a few other things also line up.
Before entering, I'm checking:
• Is there a clear range rather than just a temporary pause?
• Is there an economic release, Fed event or other catalyst coming up?
• Where are my short strikes relative to the edges of the range?
• What happens to the position if SPY breaks that range quickly?
• Is the loss defined before I enter?
The last two matter more to me with 0DTE because theta isn't the only thing accelerating near expiration. Gamma is high too, especially near the money, so a position that looks comfortable can change quickly once price starts moving toward the short strike.
You can see that transition on the right side of the chart.
The setup spends most of the session rotating inside the range, then price finally breaks higher. If I'm still holding short calls into that move, I'm no longer relying on the same conditions I entered under.
This is also why I don't treat “SPY is ranging” as enough reason to sell premium. I want to know what I'm risking if the range stops holding.
On a 0DTE trade, I'll usually give up some credit in exchange for defined risk rather than leave the position open-ended. The maximum premium isn't worth much to me if one fast move can put the funded account close to its drawdown limits.
I've been applying the same thinking on my Vanquish funded account and the goal was never to collect premium every day. Some sessions make sense for it, and some are much cleaner as directional trades or no trade at all.
For anyone selling SPY 0DTE premium, what tells you the range is worth selling rather than waiting for a breakout?