Changelog

AI Assistant Upgrades: Support/Resistance Drawing, Shorting Strategies & Smarter Backtesting Feature

Major AI Assistant improvements across the board. Support and resistance levels can now be drawn directly on the chart, backtesting now supports shorting strategies and time-based filters, and the assistant is smarter at understanding your requests.

• Right-click or press Escape during drawing mode to cancel and undo drawing mode
• Added clickable example prompts for backtesting strategies in the AI Assistant sidebar
• AI Assistant can now identify support and resistance levels and draw them directly on the chart with a "Draw Levels on Chart" button — support lines are green, resistance lines are red
• Support/resistance levels work cross-symbol — if you ask about a different ticker, the button automatically switches to that symbol before drawing
• Backtesting now supports shorting strategies (short/cover) and combined long+short strategies with proper entry/exit markers and P&L calculations
• Backtesting now handles time-based strategies — filter trades by quarter, month, day of week, or specific date ranges
• Intraday time-of-day filtering for backtests — specify trading windows like "only trade 9am–11am CST" with automatic timezone conversion
• AI Assistant now uses fuzzy matching to detect typos and still understand your intent (e.g., "back tast" is recognized as "backtest")
• Fixed backtest stats showing 0 trades or undefined values when the AI miscalculates — platform now recomputes stats from actual signals as a safety net
• Fixed non-indicator arrays (like setup objects) being incorrectly plotted as oscillators on the chart

Drawing Tools Bug Fixes & Persistence Improvements Bug Fix

Minor bug fixes to improve the charting experience. Drawing tools now behave more reliably across symbol switches, refreshes, and multi-chart layouts.

• Fixed crosshair getting stuck at the initial position when dragging drawings — it now follows the mouse during drag
• Fixed "Clear All Drawings" deleting drawings for the wrong symbol in multi-chart layouts
• Trendline "Extend to Left/Right" options now persist across page refreshes and symbol switches
• Only one drawing can be selected at a time — clicking a drawing now deselects all others
• Long/Short position box widths now use date-based sizing instead of index-based, so they stay consistent when zooming
• Position box widths are now preserved when switching symbols and refreshing the page

Trendline Context Menu, Extend to Infinity & Drawing Toolbar Improvements Feature

Right-click any trendline to access a new context menu with extend and delete options. Trendlines can now extend to infinity like Thinkorswim. Added a quick way to clear all drawings and reorganized the magnet tool.

• New trendline right-click context menu with Delete Trendline, Extend to Left, and Extend to Right options
• Trendline extend to infinity — extend lines infinitely to the left, right, or both directions, with the state shown via checkmarks in the context menu
• Extended trendlines are fully interactive — hit testing works on the extended portions for selection and dragging
• Added "Clear All Drawings" option to the chart right-click context menu, which removes all drawings from the chart and deletes them from Firestore
• Moved the Magnet tool below the Measure tool in the drawing toolbar with a dedicated separator
• Magnet button now has a dropdown sidebar (matching the style of other grouped tools) to choose between Weak Magnet and Strong Magnet modes

Replay Mode, Keyboard Shortcuts & Bug Fixes Update

New Replay mode for stepping through historical price action, keyboard shortcuts for undo/redo on drawings, and a batch of important bug fixes across indicator legends, VWAP, and chart layout.

• Added Replay mode for stepping through historical candles and simulating live price action
• Added keyboard shortcuts for undoing/redoing drawings, drags, and extensions
• Indicator legends are now transparent so they no longer block the chart behind them
• Legend values now clear when the crosshair leaves the chart instead of showing stale data
• Fixed legend flashing when hovering over settings/trash icons or indicator values
• Legend icons now appear before the subscription values so they stay in a fixed position
• Price info and indicator legends now stack dynamically in a single container — no more overlapping
• Fixed SuperTrend and VWAP deletion bugs where legends would reappear in the wrong pane or with incorrect names and colors
• Fixed crosshair subscription freezing after deleting an indicator while hovering over its legend
• Fixed VWAP on monthly timeframe causing candlesticks to space out by using wrong timeframe data

AI Strategy Backtester & Multi-Chart Bug Fixes Feature

The AI Assistant can now backtest trading strategies described in plain English. Simply describe your strategy and the AI will generate, execute, and visualize the results directly on your chart.

• New AI Strategy Backtester — describe a strategy like "Buy when RSI < 30, sell when RSI > 70 with a 5% stop loss" and see buy/sell signals plotted on the chart with full performance stats
• Backtest results panel shows key metrics: total return, win rate, profit factor, max drawdown, and more
• Fixed indicator restore bug where switching from 3 to 2 charts and refreshing would incorrectly copy all indicators from chart 1 to chart 2
• Fixed multi-chart layout restore to correctly preserve per-chart indicator configurations across sessions
• Various mobile UI improvements for indicator legends and backtest results panel

Multi-Chart Layouts, New Chart Types & Persistent Workspaces Feature

Major update to chart layouts and workspace persistence. Multi-chart layouts now support fully independent chart instances, new chart types have been added, and your entire workspace is saved and restored across sessions.

• Multi-chart layout now supports separate independent chart instances — watch different symbols, timeframes, and chart types on each pane
• Added new chart types: Bar, Heikin Ashi, Line, Area, and Baseline in addition to Candlestick
• Full chart layout persistence — number of panes, per-chart symbols, timeframes, chart types, and indicators are saved to the cloud and restored on login across devices
• Per-chart indicator management — add or remove indicators on individual charts independently
• Drawings now save and restore correctly on all charts, not just the primary chart
• Drawings made on any chart pane now save under the correct symbol
• Click any chart pane to select it and change the symbol for that specific chart
• Auto Chart Pattern recognition has been updated and is now a toggleable indicator that can be easily added and removed
• Various UI improvements and polish

New Timeframes & Trendline Precision Feature

Added 15-minute and 30-minute timeframe options, extended intraday data ranges, and improved trendline rendering precision across timeframes.

• Added 15-minute timeframe option with up to 1 month of historical data
• Added 30-minute timeframe option with up to 1 month of historical data
• Extended 1-minute data range from 1 day to 7 days
• Extended 2-minute data range from 5 days to 1 month
• Trendlines now render pixel-perfect across all timeframes (daily, weekly, monthly) by snapping to the correct containing bar
• Fixed trendline X-coordinate drift caused by timestamp interpolation between bars on higher timeframes

Stay Signed In & Cross-Timeframe Drawing Accuracy Update

Added a "Stay signed in" option on the login page, and major improvements to how drawing tools render across different timeframes.

• Added "Stay signed in" checkbox to the login page, checked by default
• When checked, sessions persist across browser restarts using local storage persistence
• When unchecked, sessions end when the browser tab is closed using session storage persistence
• Added time extrapolation to the chart engine, allowing drawings to render beyond the current data range
• Trendline endpoints now use local time-step interpolation instead of global averages, eliminating slope distortion caused by overnight gaps
• Fixed trendlines snapping to the edge of data when endpoints fall outside the current timeframe's data range
• Drawings placed in the future on higher timeframes (e.g., daily) now project correctly on lower timeframes (e.g., 1-minute, 5-minute)
• Added float-index coordinate conversion for smooth positioning of drawings at any time, including before the first candle or after the last
• Backward extrapolation now works correctly, allowing drawings to extend before the earliest available data

Email-Notified Alerts (Premium) Feature

Premium users can now receive email notifications when their alerts trigger, sent directly to their account email.

• Email notifications sent from alerts@chartinglens.com when any alert triggers
• Includes alert details: symbol, price, condition, and timestamp
• Enabled by default for Premium users, toggle on/off in Account Settings
• Free users retain 3 price alerts with browser notifications only

Cross-Timeframe Trendline Fix & Chart Engine Improvements Fix

Extended the settings/delete legend to all drawing tools, and fixed trendline rendering and interaction issues when switching between timeframes.

• Added draggable settings and delete legend to all drawing tools (fibonacci, horizontal lines, vertical lines, horizontal rays, parallel channels, arrows, rectangles, date ranges, price ranges, and text annotations)
• All drawing tools now support customizable color, line width, and line style from the selection legend
• Fixed trendline rendering at wrong Y-position when switching between timeframes (e.g., daily to hourly)
• Trendlines now use proper line equation extrapolation to calculate correct coordinates for the visible time range
• Fixed "Cannot update oldest data" console error caused by whitespace data blocking real candle updates
• Fixed trendlines not being selectable or clickable after switching timeframes
• Selection indicators now render at the correct position matching the trendline on all timeframes
• Fixed trendline disappearing when zooming out to the chart data boundary
• Added line clipping algorithm for proper canvas bounds handling on extreme zoom levels

Trendline Alerts & Drawing Improvements Feature

Set alerts directly on trendlines, customize drawing appearance, and improved position persistence.

• Fixed bug for long and short positions where time extensions are now persistent on save/load
• Added draggable legend on trendline selection that includes settings, alerts, and delete button
• Added customizable options for trendlines (color, style, width)
• Added alerts on trendlines with 2 trigger types: candle close on a selected timeframe, and real-time price cross
• Trendline alerts support both stocks (Yahoo Finance) and crypto (Coinbase/Binance)
• Trendline alert points automatically update when dragging/moving the trendline
• Deleting a trendline automatically removes its associated alerts
• Trendline alerts are a premium feature

Quick Alerts & Chart Alert Lines Feature

New quick-add alert button on the price axis and visual alert lines on the chart for faster alert management.

• Added a "+" button next to the price axis to quickly add price alerts at any level
• Button follows the crosshair position and works on both desktop and mobile
• Clicking the button opens a confirmation modal with auto-detected alert condition (above/below current price)
• Active alerts now display as dashed lines on the chart for the current symbol
• Alert lines are clickable/tappable to reveal a delete option with trash icon
• Alert lines automatically update when switching symbols or adding/removing alerts

Landing Page Overhaul & Contact Form Update

Major updates to the landing page with improved mobile experience and new pages for better user engagement.

• Added mobile hamburger menu for navigation on tablets and phones
• Created dedicated Features page with detailed descriptions of all platform capabilities
• Renamed "13F Filings" to "Superinvestor Tracking" for clarity
• Reordered features to highlight AI Buy Signals, AI Assistant, and Legendary Investor Tracking
• Added track record links to AI Buy Signals sections for transparency
• Updated pricing section with accurate feature limits for Free and Premium tiers
• Created Contact page with email form for user inquiries
• Added SEO structured data (JSON-LD) to all pages for improved search visibility

AI Signals Watchlist & Track Record Page Feature

Enhanced AI Buy Signals with watchlist stocks and launched a public track record page to showcase verified signal wins.

• AI Buy Signals now shows up to 25 stocks - active positions plus watchlist stocks that are close to triggering
• Watchlist stocks display with a "Watch" badge showing why they're being monitored (e.g., "Waiting for ADX cross")
• New Track Record page showing verified wins - stocks our AI identified before they became top market gainers
• Track record automatically updates daily after market close
• Added SEO improvements including sitemap.xml and structured data for better search visibility

AI Buy Signals Overhaul & Forward Test Stats Feature

Completely reworked AI Buy Signals to show only active trades with transparent entry data. Added a new stats panel for forward testing results.

• Reworked AI Buy Signals to show only current active trades with entry date, entry price, and CL Score at the time of entry
• Added a draggable Stats Panel to the chart when forward testing is active, showing win rate, average gain, and historical trade results
• Forward test markers now persist when changing symbols if the toggle is active
• Added PE ratio and analyst upside to signal cards
• Removed redundant confidence indicator from CL Score - win rate now shown in Forward Test panel

Data Caching and AI Signal Improvements Update

Improved loading times with data caching and enhanced AI Buy Signals quality with backtesting visibility.

• SuperInvestors, Insider Trading and AI Signal data is now cached for an hour until refreshed, improving loading times and request limits
• AI Buy Signals have been upgraded with better quality signal filtering and backtesting has been implemented to see the trades behind the confidence scores

Tutorial and Streak Rewards Feature

Added interactive tutorial and daily streak rewards system for user engagement.

• Added Tutorial for the platform
• Added a streak system to get bonus rewards for returning users
• Small UI changes and updates

New indicators and drawing tools Feature

Added new technical indicators and drawing tools for enhanced chart analysis.

• Added Horizontal Ray drawing tool
• Added VWAP, SuperTrend, Average True Range, and On-Balance Volume indicators
• Many small UI upgrades and improvements

UI improvements and premium features Update

Improved UI dramatically. Increased the AI free limit from 1 to 2 credits. Added star next to symbol to easily add to the current watchlist.

• Improved UI dramatically across the platform
• Increased the AI free limit from 1 to 2 credits
• Added star next to symbol to easily add to the current watchlist
• Enhanced premium feature presentation and subscription modal
• Added social proof and improved upgrade prompts

Mobile improvements and bug fixes Fix

Enhanced mobile experience and fixed critical bugs. Updated premium feature restrictions.

• Fixed the UI to be more friendly on Mobile and fixed selection bug for some drawings on Mobile (Now all features are working on mobile)
• Fixed Analyze Chart screenshot option in the AI Assistant
• Updated free user permissions
• UI improvements

Position tracking and watchlist management Feature

Added long and short positions with sizing and PnL tracking. Enhanced watchlist management with ability to create, rename, and organize multiple watchlists. Fixed drawing persistence bug across symbol changes. Various UI improvements.

• Long positions and short positions with sizing and tracking PnL
• Watchlist management (Adding symbols, clearing watchlists, creating multiple watchlists)
• Fixed a bug where certain drawings were persistent across symbol changes
• Small UI updates and improvements

Enhanced filtering and drawing tools Feature

Added new filtering options and drawing capabilities for better chart analysis.

• Price range filter for advanced screening
• Date range filter for historical analysis
• Rectangle drawing tool for area highlighting
• Various bug fixes and performance improvements

New drawing tools Feature

Expanded drawing capabilities with three new powerful tools for technical analysis.

• Parallel channel for trend analysis
• Text annotations for chart notes
• Arrow tool for highlighting key points

Cross-device drawing sync Fix

Fixed mobile chart functionality. Drawings now save and sync properly across all devices.

Redesigned interface Feature

New unified toolbar design with cleaner layout and improved icon system.

Platform launch New

ChartingLens is now live with full charting capabilities, indicators, and drawing tools.