This example presents four interactive ECharts visualizations of Apple stock data from aapl_historical_data.csv. A monthly line chart shows closing prices with a dashed average line and smooth curve. A quarterly bar chart displays average daily volume, using color to highlight high-volume periods. An annual candlestick chart depicts open, high, low, and close prices using ECharts' candlestick series type. A histogram reveals the distribution of daily returns, binned at 0.5% intervals. Each chart parses the CSV via JavaScript's `fetch` and uses ECharts 5.4.3 with custom tooltips and axis formatting.