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Chrome permission

Quick fixes for "unable to capture chart" errors and screenshot problems.

Quick Checklist​

When chart capture fails, verify:

Most Common Issue: Browser Permissions​

Error Message​

"ChartLense™ was unable to capture the chart. Try:

  1. Goto Chrome 'Manage Extension'
  2. Find ChartLense™ and goto 'Details'
  3. Switch Off->On 'Allow access to file URLs'

Check Settings for Site-Access​

This is the #1 cause of chart capture failures:

  1. Open Chrome Extensions:

    • Go to chrome://extensions/
    • Find ChartLense™ in the list

  2. Check Site Access settings:

    • Click "Details" on the ChartLense extension
    • Check "Automatically allow access..." is ON
    • Scroll down to "Allow access to file URLs" Toggle OFF/ON

    Browser Settings showing Allow access to file URLs enabled Chrome extension settings showing Site access properly enabled

  3. Test the Fix:

    • Go back to your trading platform
    • Try capturing a chart again
    • The error should now be resolved

🔓 Why "Allow Access to File URLs" Enhances Your Analysis​

This permission enables ChartLense's three core capabilities that give you maximum trading flexibility:

🌐 Universal Platform Support​

  • Pre-configured platforms: TradingView, StockCharts, ProRealTime, Yahoo Finance
  • Dynamic expansion: Instantly works on any new trading platform you discover
  • No waiting: Add support for emerging platforms without extension updates
  • Future-proof: Ready for new trading tools as they emerge

📊 Local File Analysis​

  • Analyze saved chart screenshots from any source
  • Work offline with downloaded historical charts
  • Review archived trading analyses and reports
  • Process charts from platforms that don't support direct browser analysis

🔒 Security & Your Control​

  • Permission activates only when you choose to analyze a chart
  • No auto-scanning: ChartLense never accesses files without your explicit action
  • Privacy-first: Local files processed in your browser, never uploaded
  • Chrome-protected: Uses Chrome's secure file access protocols

This flexibility ensures ChartLense adapts to your trading workflow, rather than limiting you to specific platforms.

Other Common Solutions​

1. Activate the Extension​

Problem: Extension not activated on current page

Solution:

  • Click the ChartLense icon ChartLense icon in Chrome toolbar
  • Wait for side panel to open
  • Then try chart analysis

2. Supported Trading Platforms​

ChartLense works on most trading platforms. If you're using a platform that isn't pre-configured, ChartLense can request permission to work there instantly.

See our complete guide: Using ChartLense

3. Chart Size Issues​

Error: "The chart image is currently too small to capture"

Solution:

  • Make chart larger on your screen
  • Zoom out if chart is too zoomed in
  • Maximize browser window
  • Ensure chart is visible on screen

4. Page Refresh​

Problem: Extension not properly loaded

Solution:

  1. Refresh the trading page (F5)
  2. Click ChartLense icon ChartLense icon to activate
  3. Try chart capture again

Advanced Troubleshooting​

Check Extension Status​

  1. Right-click ChartLense icon ChartLense icon
  2. Select "This can read and change site data"
  3. Ensure it shows "On [site]" or "On all sites"

Browser Console Debugging​

  1. Press F12 to open DevTools
  2. Go to Console tab
  3. Try chart capture
  4. Look for specific error messages

Extension Reload​

  1. Go to chrome://extensions/
  2. Find ChartLense™
  3. Click reload button
  4. Test chart capture again

Still Having Issues?​

If none of these solutions work:

  1. Check your Chrome version: ChartLense requires Chrome 88+
  2. Disable other extensions: Temporarily disable other extensions that might interfere
  3. Try incognito mode: Test if the issue persists in incognito (ensure extension is enabled for incognito)
  4. Contact support: Email us at support@chartlense.com with:
    • Your Chrome version
    • Trading platform you're using
    • Complete error message
    • Screenshot of your extension settings