How Dealers Move Price
Most intraday moves aren't sentiment — they're hedging. When you understand what a market maker is forced to do after they take the other side of your trade, the "random" candles start making sense.
After all the Greeks, here's the intuition that ties everything together. The market maker isn't your enemy and isn't a genius with secret information. They're a business with one goal: collect the spread and stay neutral. Everything they do follows from that — and that behavior is what pushes price around all day.
01The dealer wants premium, not direction
A market maker earns from the bid-ask spread and from collecting premium. They genuinely don't want a directional bet. But the moment they sell you an option, they've automatically opened a position with delta. To get back to neutral, they hedge it — buying or selling spot and futures in the right proportion.
What the dealer does the moment you open a position
| You do | Dealer gets | Dealer's delta | Opening hedge |
|---|---|---|---|
| Buy CALL | short call | negative | Buys spot |
| Buy PUT | short put | positive | Sells spot |
| Sell CALL | long call | positive | Sells spot |
| Sell PUT | long put | negative | Buys spot |
That's the static hedge — a one-time adjustment at the moment of opening. The interesting part is what happens next, as spot starts to move.
02What happens as spot moves — the gamma engine
This is dynamic rebalancing, and it's where gamma enters. Delta isn't fixed — it changes as spot moves. So the dealer's hedge has to change too, continuously.
A dealer who is short gamma is forced to buy as spot rises and sell as it falls — they pour fuel on the fire. A dealer who is long gamma does the reverse, leaning against every move and quietly draining its energy.
It's not the options themselves that move the market. Options force hedging, and that hedging is real buying and selling in spot and futures. That flow is the price action.
03Where the famous rules come from
Every trader-Twitter cliché traces back to short-gamma hedging:
- "Calls drive rallies" — dealers short gamma must buy as spot rises.
- "Puts drive sell-offs" — dealers short gamma must sell as spot falls.
- "Squeeze setup" — lots of OTM calls sold to dealers; as spot approaches them, dealers buy aggressively to hedge, and the move feeds itself.
When you see −GEX + heavy call OI near spot + rising price, you're looking at a squeeze in the making — dealers have no choice but to keep buying. When you see +GEX + big OI clusters, expect price to range and get pulled toward those strikes.
04Why this is your edge
Three intuitions to keep:
- Retail gets emotional; the dealer hedges mechanically. Most intraday moves are mechanics, not a change in fundamentals.
- Large OI clusters are potential price magnets, especially near expiry.
- Most retail traders never read positioning. If you can read GEX, OI and flow together, that's a genuine informational edge.