FlowMonkey vs Skylit, Voltick and SpotGamma: what each gamma map shows, and what each one grades
Every gamma map is built from the same public options chain. What differs is how each product signs a strike, how it decides which level matters, and whether it shows you afterwards how its levels did. This page describes each product from its own public pages as of September 2026, then says plainly what FlowMonkey does differently. It is written by FlowMonkey, so read the last part as our position, not a neutral ranking.
What the four products put on screen
Skylit (Heatseeker) shows a per-strike heatmap with a 'king node' marked as the heaviest strike, patterns it names in its public docs (whipsaw, rainbow road, gatekeeper, trend, rug setup), and a companion flow product. Its per-strike sign is its own model; a positive node reads as absorbing, a negative node as accelerating, and the sign can be negative above price.
Voltick shows a strike ladder of net gamma with percent change over the last window, a starred king strike, a put wall, a flip level and an expected-move band, with a 0DTE column beside the full book.
SpotGamma publishes key levels (call wall, put wall, volatility trigger), a realtime hedging-pressure indicator, and daily notes. It leans on the assumed dealer convention and a large research library.
FlowMonkey shows the same kind of strike-by-expiry map, with the heaviest strike above price called the lid, the heaviest below called the shelf, and the single heaviest strike on the board called the apex. Beside the map sit a written read of the board, a live alerts feed and an analyst you can ask questions in plain English.
The sign is the real difference between products
Most maps sign a strike by an assumption: calls are dealer-long (positive gamma), puts are dealer-short (negative). Under that convention everything above price is positive and everything below is negative, always. It is simple and it is often wrong, because it ignores who actually bought and sold the contracts.
Skylit's public material describes a per-strike sign that comes from its own positioning model, which is why its boards show big negative nodes above price and big positive nodes below. That shape cannot appear on an assumed-sign map at all.
FlowMonkey's member map uses the assumed sign today. Since September 2026 we also compute a measured sign for every strike from the day's own prints (whether each trade lifted the offer or hit the bid), run the same pattern detector on it across every active map, and grade the difference. It stays off the member map until the grade says it earns a place. When we tested our measured sign against 44 labelled strikes from a published Skylit board, it agreed on 45 percent, so we do not claim to reproduce theirs.
Which products show their misses
Skylit, Voltick and SpotGamma publish levels and commentary. As of September 2026 none of their public pages carries a running, dated record of every level called and how each one resolved, with the failures listed beside the successes.
FlowMonkey seals its levels at 9:12 ET, before the open, in a hash-chained file that cannot be edited afterwards, and grades them at the close on a public ledger. Every alert shown to members is recorded with the price at the moment it was shown, and the receipts page lists the whole day, including the alerts that went nowhere. We publish counts, never hit rates, and every rate we do publish sits beside the control it was measured against.
How to choose
If you want the most widely shared boards and a large community reading them, Skylit is where most screenshots on X come from. If you want a fast 0DTE ladder with percent change, Voltick is built for that. If you want research notes and key levels each morning, SpotGamma has the deepest library.
If you want to check the levels yourself before you trust them, FlowMonkey is the one built so that you can: the seal, the ledger and the receipts exist so a stranger can audit us without taking our word for anything.
| Skylit Heatseeker | Voltick | SpotGamma | FlowMonkey | |
|---|---|---|---|---|
| Per-strike map | Yes | Yes (ladder) | Key levels | Yes |
| Strike sign | Own model; can be negative above price | Net GEX with % change | Assumed convention | Assumed on the member map; measured sign in shadow |
| Named patterns | Yes (Patternpedia) | No | No | Yes, each graded vs control |
| Levels sealed pre-open, hash-chained | No | No | No | Yes, 9:12 ET |
| Public dated record incl. misses | No | No | No | Yes (ledger + receipts) |
| Alerts feed with frozen entry price | Flow product | No | Hedging indicator | Yes |
| Ask-it-anything analyst | No | No | No | Yes (Argus) |
Common questions
Is FlowMonkey a copy of Skylit?
No. The map format is common to every gamma product because the input is the same chain. FlowMonkey's vocabulary, its pattern grading, the pre-open seal and the public receipts are its own, and its measured sign is computed from the trade tape rather than from any other product's output.
Which gamma map is the most accurate?
None of the four publishes a like-for-like accuracy figure, and FlowMonkey does not publish win rates at all. What FlowMonkey publishes is every level and alert with its outcome, so you can measure it yourself against the control on the same page.
Do gamma levels predict direction?
No. Dealer positioning describes how price is likely to behave near a level, absorbing or accelerating, not which way it will go. Any product selling a gamma level as a directional signal is selling something the number cannot deliver.
Same chain, different sign models, and only one of the four shows you its misses. Pick the one whose claims you can check.
Keep reading
See it on a live board
FlowMonkey prices every level by whether your ticker can actually reach it today — measured on that symbol's own range, re-sorted as the session burns down.
See pricing