Now I understand the current architecture. I need to:

1. Create an API route to fetch real-time EUR/USD daily data from Alpha Vantage
2. Add localStorage caching for API data
3. Add an "Update Data" button in the header
4. Merge API data with the existing generated data

Now update the page to integrate the API data fetching and add the "Update Data" button:

I've implemented the real-time data pipeline with the following components:

1. API Route (/app/api/forex/route.ts) - Fetches EUR/USD daily data from Alpha Vantage free API with the demo key, returns JSON candles sorted by time.
2. API Data Library (/lib/api-data.ts) - Manages localStorage caching (4-hour expiry), fetches fresh data when needed, and merges API candles with generated CSV data (API takes priority for overlapping dates).
3. Updated Page - On app load, checks localStorage cache first; if valid, uses cached data instantly. Otherwise fetches from API in background. The green "Update Data" button in the header forces a fresh API call and updates the chart. Status shows connection icon, source label, and last update time.

Now I understand the current architecture. The playback uses a simple setInterval approach. I need to implement a more sophisticated animation system using requestAnimationFrame with:

1. Smooth streaming using RAF instead of interval
2. Smooth panning effect
3. Variable speed that affects animation frame timing
4. Visual interpolation between candle states

Let me implement this:

Now update the page to use the new animation engine:

Now update the candlestick chart to support smooth scrolling during animation:

Now I need to update the chart component's interface to accept the animation props:

Now update the chart's data effect to use smooth scrolling during animation:

Now let me also update the FloatingController to have better visual feedback during animation:

I've implemented a video-style fast-forward animation system for the candle playback. The new useAnimationEngine hook uses requestAnimationFrame for smooth 60fps animation instead of setInterval, providing a fluid video-like playback experience. The system includes: cubic ease-out interpolation between candles for smooth price motion, variable speed control (0.5x to 10x) that directly affects animation frame timing, automatic smooth scrolling to keep the latest candle visible, and an enhanced progress bar with a pulsing gradient effect during playback. The candles now stream in with a fast-forward feel rather than appearing in discrete jumps.