Real-time gap detection
Compares the live 9:30 ET open to the prior RTH close. Sub-second classification. Custom session-time supported for futures and equities globally.
v1.0 · Pine Script v6
The opening gap, decoded.
GapX is a precision indicator for TradingView that tracks how the market treats the prior close — the single most-watched level on any session open.
0
% historical QQQ gap fill rate*
0
distinct gap states tracked
0
smart alert conditions
Features
Built for the open. Engineered for clarity.
Every feature exists for one reason — to make the opening read instant and unambiguous.
Auto-drawn levels
Target, open, and optional 50% retrace lines plot directly on the chart with labels — no manual marking, no measurement errors.
Five distinct gap states
Waiting · No gap · Open · Partial (≥50%) · Filled. Each state has its own color, label, and trader-facing "read" — no ambiguity.
Three smart alerts
Gap fill triggered. 50% retrace reached. Unfilled at close. Set them once and let the market come to you.
Live hit-rate tracking
Counts sessions watched and gaps filled in real time. Build conviction with your own data, not someone else's marketing.
Five aesthetic themes
Midnight, Graphite, Slate, Emerald, Amber. Compact "Minimal" mode for clean charts. Six anchor positions for any layout.
Your edge
Why the open matters more than anyone admits.
The first thirty minutes of US equity trading set the tone for the entire session. Institutional flow concentrates at the prior close — it's where overnight P&L is marked, where options dealers re-hedge, and where stop runs cluster.
GapX doesn't predict. It measures. It tells you, in plain language, what the auction is doing with the most-watched level on the chart — so you can act with structure instead of guessing.
- › Mechanical state — no chart-reading interpretation
- › Bias confirmation in under a second
- › Removes "did it fill or didn't it" arguments
- › Works on every symbol you watch
71%
Historical QQQ daily gap-fill rate
"A gap that fails to fill on a high-volume open is one of the cleanest continuation signals in equities. A gap that fills immediately is one of the cleanest reversal warnings."
Setup
From zero to signal in under a minute.
01
Open Pine Editor
In TradingView, click "Pine Editor" at the bottom of any chart.
02
Paste the script
Drop in the full GapX Pro v1 script, click Save, then "Add to chart."
03
Wire your alerts
Right-click the chart → Add alert → Condition: GAPX Pro → pick a trigger.
Why GapX
The same job. Done five different ways.
Most traders track the gap by hand or with bare-bones scripts. GapX turns it into structured intelligence.
| By hand | Other gap scripts | GapX | |
|---|---|---|---|
| Time to identify the gap | ~30s | Instant | Instant |
| Auto-drawn target & open lines | ✕ | Sometimes | ✓ |
| Five distinct gap states | ✕ | Usually 2 | ✓ All 5 |
| 50% retrace detection | ✕ | Rare | ✓ |
| Live hit-rate counter | ✕ | ✕ | ✓ |
| Smart alert conditions | ✕ | 1 if any | 3 native alerts |
| Distance-to-fill counter | Mental math | ✕ | ✓ |
| Multi-symbol (any chart) | N/A | Usually fixed | ✓ Configurable |
| Configurable session (futures) | Mental | Hardcoded | ✓ |
| Pine v6 optimized | — | Usually v4/v5 | ✓ |
| Cost | Your attention | Free → $200 | $99.99 lifetime |
Pricing
One indicator. Two ways in.
Same script, same updates, same support. Pick the plan that fits how long you plan to trade.
Monthly
Test it out. Cancel anytime.
$
19.99
/month
- ✓ Full GapX Pro indicator
- ✓ All 3 smart alerts
- ✓ All 5 themes
- ✓ Hit-rate analytics
- ✓ Free updates while subscribed
- — Cancel anytime
Best value
Lifetime
Pay once. Use forever. ~5 months of monthly.
$
99.99
one-time
- ✓ Full GapX Pro indicator
- ✓ All 3 smart alerts
- ✓ All 5 themes
- ✓ Hit-rate analytics
- ✓ Lifetime free updates
- ✓ Priority support
30-day money-back guarantee · Secure checkout · No telemetry, ever
Delivery
From checkout to your chart in 60 seconds.
No file management, no manual installs. GapX is delivered as a TradingView invite-only script.
1
Secure checkout
Pay via Whop. Enter your TradingView username at checkout so we can grant access.
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2
Instant email receipt
Within 60 seconds you get an email confirming payment and a direct invite-only script link.
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3
Add to chart
Click the link, GapX appears under your Invite-only scripts in TradingView. Apply to any chart.
Need help after purchase? Email support@gapx.app or hit us in Discord — we respond inside one business day.