What Is an Anchor Point?
The Anchor Point is the gamma-weighted center of dealer positioning for a given underlying -- the single strike price where market maker gamma exposure is most concentrated. Because dealers must continuously hedge their options books, the strike with the highest net gamma creates the strongest mechanical pull on price. Think of it as a gravity well: the heavier the gamma concentration at a strike, the more buying and selling dealers are forced to do near that level, and the more that activity draws price back toward it throughout the session.
In plain terms: the Anchor Point is the price level where dealers are doing the most hedging work, and that constant activity tends to keep price orbiting nearby -- especially in a positive-gamma environment. You can explore the full mechanics behind gamma exposure in What Is Gamma Exposure, and see the Anchor in context on the DealerEdge feature page.
Why the Anchor Point Matters
Most support and resistance levels on a chart are backward-looking -- drawn from where price has been. The Anchor Point is forward-looking. It reflects where the current options market's heaviest positioning sits, which means it captures where dealers will be most active today, not where they were active last month.
When dealers hold long gamma at a strike, their hedging is countercyclical: they buy the underlying when price falls toward the strike and sell it when price rises away. That automatic activity acts like a rubber band, pulling price back toward the Anchor. In a strong positive-gamma session, this effect can keep a market in a tight intraday range around the Anchor for hours -- a pattern that surprises traders who expect breakouts that never come.
Understanding the Anchor also helps you place stops more intelligently. A stop just below the Anchor in a Rating 1-2 environment is likely to be triggered repeatedly by dealer hedging bounces, not by genuine directional moves. Knowing the Anchor prevents that kind of costly false exit.
How Anchor Points Form
Anchor Points emerge from the options open interest landscape. When a large volume of options contracts -- calls, puts, or both -- is outstanding at a single strike, the dealers who are short those contracts carry significant gamma exposure there. Round numbers attract this concentration naturally: strikes at $500, $450, or $200 are common Anchor candidates because they are where institutions, funds, and retail hedgers alike tend to place large positions.
Monthly and quarterly expirations deepen the Anchor effect because positions have had more time to build at key strikes. As expiration approaches, open interest at the dominant strike may represent a substantial fraction of total market gamma, intensifying the pinning effect in the final days of the cycle. After expiration, the Anchor often jumps to a new strike as the next month's positioning takes shape, so you should check DealerEdge at the start of each new expiration cycle.
How to Read the Anchor in DealerEdge
Open DealerEdge and pull up the heatmap for your underlying. The Anchor Point is the tallest bar on the heatmap -- the strike with the highest absolute gamma concentration. DealerEdge also labels it explicitly so you do not have to hunt for it visually. Note its distance from the current spot price: an Anchor that is 0.5% away from spot exerts strong pull right now; one that is 3% away is a longer-term reference level rather than an immediate intraday magnet.
In Focus Mode, you see the full heatmap for one underlying with the Anchor clearly highlighted alongside the GEX Flip Point and Defense Lines. In Pro Mode, you can compare Anchor Points across multiple underlyings simultaneously -- useful when you are deciding whether to trade SPY or SPX and want to see which has a more favorable gamma structure for your setup.
Trading Around the Anchor: A Concrete Example
For example, suppose SPY opens at $518 and the DealerEdge heatmap shows an Anchor Point at $520, with a GEX Rating of 2. The Anchor is about 0.4% above spot. Defense Lines sit at $517 below and $523 above. In this setup, the mechanical path of least resistance is for SPY to drift from $518 toward $520 through the morning, with dealer hedging absorbing any small dips back toward $517.
A range-bound strategy makes sense here: you might buy a call spread targeting $520, with a stop below the $517 Defense Line. If SPY reaches $520 and consolidates there, the Anchor is acting as a pin -- you would close the position rather than expecting a continued push to $523, because the same gamma that pulled price up will now resist further movement away from the Anchor. This is not a guaranteed outcome; it is an illustration of how the Anchor shapes the mechanical bias for the day.
The picture changes if SPY drops below the GEX Flip Point. At that point, dealer hedging flips from stabilizing to amplifying, and the Anchor's pull weakens considerably. Recognizing that transition early is essential to avoiding a reversal trade that works against you.
Anchor Point Shifts
The Anchor is not a permanent level. It updates continuously as options positions are opened, closed, and rolled. Watch for the Anchor to shift when:
- A major options expiration passes and a new dominant strike emerges in the next cycle
- A catalyst (earnings, Fed announcement, macro data) causes rapid repositioning across strikes
- A large block of positions at the current Anchor strike is unwound, reducing its gamma concentration relative to a neighboring strike
When the Anchor shifts during a session, update your levels immediately. A trade targeting the old Anchor on a trend toward the new one becomes a counter-trend fade -- the opposite of what you intended.
Anchor Point and GEX Rating Together
The Anchor Point's pull is strongest when the GEX Rating is 1 or 2 -- strong positive gamma. In those environments, mean-reversion strategies targeting the Anchor consistently produce the highest-probability setups: fade the move away from the Anchor with a tight stop, and target the return to the Anchor. Iron condors and butterflies centered at the Anchor capture the pinning effect directly.
In a Rating 3 environment, the Anchor still exists and still influences price, but its pull is lighter. Treat it as a reference level rather than a high-conviction target, and use wider stops to account for the reduced certainty.
In a Rating 4-5 environment, the Anchor point is visible on the heatmap but its gravitational influence weakens substantially. Dealers are now net short gamma: their hedging amplifies moves rather than dampening them. Price can blow through the Anchor level on a directional catalyst without meaningful resistance. In these sessions, the GEX Flip Point becomes your primary reference and the Anchor becomes a secondary target at best.
Common Misconceptions
- The Anchor is not a guaranteed reversal point. It is a mechanical bias level. In a positive-gamma environment it exerts real pull, but a strong catalyst -- earnings surprise, macro data, a geopolitical headline -- can overpower dealer hedging and drive price cleanly through the Anchor without a bounce. Always combine the Anchor with your broader trade thesis, not as a standalone signal.
- The Anchor is not the same as a moving average or VWAP. Those indicators are derived purely from price history. The Anchor is derived from current options positioning. It can sit at a level where price has never been before if that is where the heaviest open interest is concentrated, and it will still exert mechanical pull.
- A far Anchor does not mean no influence. An Anchor that is 2-3% from spot is less immediately active than one 0.3% away, but it still represents a meaningful target for the session. In a quiet Rating 1-2 day, price can travel steadily toward a distant Anchor over several hours as dealer hedging accumulates in that direction.
Related
See also: DealerEdge Quick Start for the full five-minute orientation, The GEX Flip Point to understand when the Anchor's pull breaks down, Defense Lines for the mechanical support and resistance levels flanking the Anchor, and What Is Gamma Exposure for the underlying math. The DealerEdge feature page has the full module overview.