Source: This post originated from my journal entry on March 13, 2026.
Today was SENSEX weekly expiry day, and I completely forgot about it.
At around 2:15 PM, I should have been paying attention to the charts, watching for that familiar pattern I’ve seen before. I should have been ready to add a position. But I wasn’t. I was distracted, occupied with other things, and the opportunity passed me by.
I knew exactly what to do. I had done the same thing during the last expiry, though, didn’t make money, but if had done the same today, definitely money was on the table.
Expiry days create unique opportunities. As the clock gets closer to 3:30 PM, the gamma of near-the-money options accelerates price movements. Small moves in the underlying index can create outsized moves in option prices. This is what traders call “gamma moves,” and they are surprisingly predictable if you know when to look.
But knowing is not enough. You have to remember to act.
This isn’t just about missing one trade. It’s about the discipline of following your system. Trading isn’t about being right every time—it’s about being consistent. When you have an edge, you need to show up and execute. Every single time.
The markets don’t care that you were busy. They just move, with or without you.
So here’s what I need to do differently. I need to mark expiry days on my calendar with reminders. Set alerts for 2:00 PM on expiry days. Create a checklist for expiry day opportunities. Review my playbook before the trading session on expiry days.
Gamma moves on expiry days are a real edge. They won’t work every time—nothing does—but over a series of trades, following this pattern may definitely make money. The only variable I can control is whether I’m there to take the trade.
Today was a reminder: an edge unused is no edge at all.
The next expiry is coming. I’ll be ready.