PHASE 2 - ENHANCED

🚀 Advanced Real-Time Charts

Multi-level caching, API fallback chain, market hours detection, and automatic refresh.
Version 2.0.0 with localStorage persistence and Alpha Vantage backup.

🎯 Phase 2 Features (Just Implemented)

Multi-Level Caching: Memory (5min) + localStorage (24hr)
API Fallback Chain: Finnhub → Alpha Vantage → Sample
Market Hours Detection: 9:30 AM - 4:00 PM ET tracking
Auto-Refresh: Updates every 15min during market hours
Market Status Badge: Real-time open/closed indicator
Data Source Tracking: Shows which API provided data

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Market Status

Cached Symbols

0 KB

Cache Size

API Calls Made

📊 Live Demo: Auto-Refreshing Chart

This chart demonstrates Phase 2 features: multi-level caching, API fallback, market status, and automatic refresh every 15 minutes during market hours. Try different symbols and watch the data source badges change as it falls back through the API chain.

⚡ API Comparison Test

Load the same symbol from different sources to see fallback in action. Watch console for detailed logging of cache hits and API calls.

Primary: Finnhub

Backup: Alpha Vantage

Fallback: Sample Data

💻 Code Examples

Create Chart with Auto-Refresh:

const chart = await window.TradingViewCharts.createChartWithData('chart-id', 'AAPL', {
    useRealData: true,
    days: 60,
    autoRefresh: true  // Refreshes every 15min during market hours
});

// Stop auto-refresh
chart.stopRefresh();

Check Market Status:

const status = window.TradingViewCharts.getMarketStatus();
console.log(status.isOpen);      // true/false
console.log(status.message);     // "🟢 Market Open" or "🔴 Market Closed"
console.log(status.nextOpen);    // "Tomorrow 9:30 AM ET"

Manage Cache:

// Get cache statistics
const stats = window.TradingViewCharts.LocalStorageCache.getStats();
console.log(`${stats.entries} symbols cached, ${stats.sizeKB} KB`);

// Clear specific symbol
window.TradingViewCharts.LocalStorageCache.remove('AAPL_D_30');

// Clear all cache
window.TradingViewCharts.LocalStorageCache.clearAll();