PatternForge AI — Chart Pattern Signals & Trade Journal

Find historical chart patterns and evaluate BUY, SELL, or HOLD signals with risk tools and a trade journal.

PatternForge AI — Historical Chart Pattern Signals & Trade Journal PatternForge AI is a chart research extension for traders who work on web-based charts. It answers one narrow, measurable question: when the current price shape appeared on this instrument and timeframe before, what actually happened next? Every BUY, SELL, HOLD, or NO SIGNAL you see comes from comparing the current price pattern against historical bars and replaying what followed. There is no fallback estimate, no seeded score, and no forced call. If the engine cannot test a direction from history, it shows HOLD — deliberately. This is analysis and planning software. It is not a broker, does not connect to your broker, and never places, modifies, or closes orders. WHAT IT DOES • Detects the symbol and timeframe of the chart you have open, or lets you pin them manually when the page does not expose them. • Fetches historical bars from the market-data source you choose (or a keyless source where available). • Matches the current 30-bar shape against every earlier, non-overlapping window in that history. • Replays each historical match bar-by-bar with the same stop and target the card shows — a stop at one risk unit, a target at the configured R multiple (default 2R). • Decides BUY or SELL only when the replay says one side paid; otherwise returns HOLD. • Shows entry, stop-loss, take-profit, first target (1R), second target, similarity, historical win rate, confidence, and an optional pair-quality score. • Names the most recent candlestick formation when it recognises one, and flags disagreement with the quant direction. • Provides a position sizer with per-instrument contract metadata (forex, metals, indices, crypto), a daily risk gate, pre-trade checklist, and post-trade review tags. • Keeps a local trade journal that closes its own trades when price reaches the stop or target, and reports expectancy, profit factor, drawdown in R, streaks, and breakdowns by session, weekday, symbol, direction, and timeframe. • Runs a walk-forward parameter sweep on demand, using only bars available at each historical anchor — no lookahead. • Provides a keyless economic calendar, a session clock, a watchlist scanner, and price alerts. Every number on the card is either measured from history or labelled as an estimate. WHAT IT DOES NOT DO • It does not place, modify, or close broker orders. The extension is read-only and blocks outgoing requests that resemble order placement — including via a custom endpoint. • It does not guarantee profit. Historical comparisons describe what happened; they do not predict what will. • It does not invent price levels. If no live quote is available, no levels are shown, and the card tells you why. • It does not force a call every candle. HOLD is a designed outcome, not a failure. • It does not send your data to the publisher. There is no PatternForge backend. HOW THE ENGINE WORKS 1. History is fetched from the first enabled provider that supports the instrument class, requiring at least 120 bars before continuing (5,000 preferred). 2. The most recent 30-bar window is z-normalised, so the shape can be compared fairly regardless of price level or scale. 3. That shape is compared against every earlier, non-overlapping window. The similarity threshold is relaxed step-by-step until at least five matches are found, and whichever threshold was actually used is reported on the card. 4. Every match is replayed forward, bar by bar, under the same stop and target the card draws. If a single bar's range spans both the stop and the target, it is counted as a loss — the conservative reading, because OHLC cannot say which came first. 5. Each match is replayed as a long and as a short. Whichever side had positive expectancy is used. If neither did, HOLD is returned. If fewer than three analogues resolved to a stop or target, NO SIGNAL is returned. 6. Confidence blends average similarity (40%), win rate (40%), and sample size (20%), and is reduced when the similarity threshold had to be relaxed. The optional AI layer never overrides any of this. It can describe a setup in plain language; it cannot move entry, stop, target, or size. KEY FEATURES Chart overlay A floating card on the chart shows the direction, levels, similarity, historical win rate, confidence, multi-timeframe agreement, session context, news status, a recent-close sparkline, and a live bar-close countdown. Drag it anywhere; lock it in place; minimise it to a header row. Command Center A full side panel with sections for Signals, Written Analysis, Journal, Scanner, Alerts, Risk Calculator, API Keys, and Settings. Includes an emergency pause and a hotkey panel. Journal that closes itself Log a trade and the background service worker watches price until the stop or target is reached — even if the chart tab is closed. The stop is checked before the target; a bar that could plausibly have touched both is scored as the worse outcome. Risk tools A position sizer using per-instrument contract metadata (not a single guessed contract size), a daily loss cap in R, max-open and max-trades-per-day caps, directional exposure warnings across pairs, a high-impact news window, and prop-firm-style presets. Limits warn at log time and can be overridden; the override is written to the journal entry. Walk-forward strategy finder Tests parameter combinations by matching using only bars available at each historical anchor, then replaying the trade forward. Reports the number of combinations tested, because sweeping many parameters on one instrument will always produce a winner by chance. Expectancy-first analytics The journal reports expectancy per trade, profit factor, max drawdown in R, best and worst streaks, and results grouped by symbol, session, weekday, direction, and timeframe — so you can see which setups actually pay. PRIVACY AND SECURITY • All keys, settings, signals, journal entries, and cached history are stored locally on your device via chrome.storage.local. • API keys are stored in a separate area (pfSecrets) from your everyday settings (pfApiConfig), every time you save. Reads merge them transparently; writes split them. Your settings never contain a saved key, even at rest. A one-time startup sweep migrates any key saved before this boundary existed. • Nothing is sent to the publisher's servers. There is no PatternForge backend. • All outgoing requests require HTTPS (loopback exempt), enforce a timeout, retry safely a limited number of times on idempotent calls, and cap response size. • Market-data requests are serialised per provider so polling, scanning, alerts and trade-monitoring cannot collide into a burst. • Anything rendered into a page is sanitised first, removing embedded scripts, frames, event handlers, and dangerous URL schemes. • Any request that resembles order placement — even through a custom endpoint — is blocked. • A normal backup export contains user data only. API credentials are never included unless you explicitly choose a separate credentials export, which warns you in advance. WHY THE EXTENSION NEEDS EACH PERMISSION • storage — save your settings, keys, signals, journal, and caches locally. • unlimitedStorage — history bars and pattern caches can be large; this prevents silent write failures. • notifications — optional desktop alerts for new signals, closed trades, and price alerts. • clipboardWrite — copy a trade setup or trade plan. • contextMenus — right-click options on chart pages. • tabs, activeTab, scripting — detect the active chart page and register the overlay where you grant access. • alarms — periodic maintenance: price alert checks, open-trade monitoring, optional broker sync. • host permissions — call the market-data, AI, and notification endpoints you enable, and run on the trading sites you visit. All permissions are used only for the extension's stated purpose. FREE AND PAID TIERS Free — full historical pattern engine on the chart overlay, unlimited HOLD/NO SIGNAL alerts, one account tag, 20 stored signals, 5 price alerts, 5 written AI analyses per UTC day, no API key required to start. Pro ($10/month or $100/year) — 200 stored signals, 50 account tags, unlimited alerts, watchlist up to 50 symbols, unlimited AI analyses, Scalp/Day/Swing trading profiles, journal CSV import, backup import, unlimited history retention. Pro+ ($20/month or $200/year) — everything in Pro plus auto trade-log API (POST closed trades to your own URL) and broker history sync (OANDA, Alpaca, Interactive Brokers Client Portal Gateway). The free tier is not time-limited. The historical engine is fully present in the free tier. IMPORTANT DISCLAIMERS PatternForge AI is educational analysis software. It is not investment advice, not a broker, and not a signal-copying service. Trading involves substantial risk of loss. Historical comparisons do not guarantee future results. Estimated levels are illustrative only. You are solely responsible for every trading decision, position size, and order you place on your own broker's platform. There is no auto-trading in this extension and there never will be. The extension cannot see your broker account, cannot read your balance, and cannot send an order anywhere. When you click Log, you are recording an intention in a local journal — nothing leaves your device to a broker. HOLD and NO SIGNAL are normal, expected outcomes. They mean the engine did not find evidence that justifies a directional call at these levels. That is the design, not a fault. Some numbers on the card are estimates, and they are labelled as such — for example, the spread component of the Pair Score, when no bid/ask is available on the page. Direction, similarity, historical win rate, expectancy, and replay outcomes are measured; those are the numbers to trust most. QUICK START 1. Install and open any supported chart. 2. The card appears in the top-right. If the site is new to you, click "Enable on this site" in the popup once. 3. Without any key, Yahoo supplies live quotes for indices, commodities and equities so you can see the card work immediately. 4. For FX and expanded history, add a free key from Twelve Data, Finnhub, EODHD, or Alpha Vantage in the API Keys tab. 5. Press R on the chart for a written read of the setup, P for the position sizer, D for your performance stats, E for the economic calendar. 6. Log a trade with the Log button; the extension watches the stop and target for you and records the outcome. User guide: https://www.alamtoolkit.com/p/patternforge-ai-chart-pattern-signals.html Privacy policy: https://www.alamtoolkit.com/p/patternforge-ai-privacy-policy.html Built by AlamToolKit.com · Non-custodial · Read-only by design.