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Yahoo Finance Chart Step 11 - Intraday Data

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CColinEberhardt
Last edited Jul 16, 2015
Created on Jul 16, 2015

A Yahoo Finance intraday stock chart displays open, high, low, close, and volume data as an area-plus-line series with a red exponential moving average line. The visualization uses the D3FC library with D3.js to render SVG elements, including annotations for the last close and EMA values, a legend, and a crosshair. Data comes from a local JSON file containing Yahoo Finance chart data, filtered to trading hours and formatted with time and price scales.

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Yahoo Finance Chart

This example visualizes intraday stock price data from Yahoo Finance using a combination of D3 and d3fc components. The chart displays high, low, open, and close prices, along with trading volume and a moving average, over a discontinuous time scale that skips non-trading hours. A crosshair tooltip shows detailed values for the hovered data point, while callout annotations highlight the most recent high and moving-average values. Trading hours are marked with vertical annotations and shaded bands, and the chart includes a legend summarizing the OHLC and volume data. The visualization uses an SVG renderer and is built with d3.v5, demonstrating how to compose multiple series and annotations using the d3fc library.

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Yahoo Finance Chart Step 7 - Annotations

This example shows an intraday stock chart for Yahoo Finance data, combining price and volume. It plots a line and area chart for open prices, overlays an exponential moving average, and draws current-value annotation lines for both the close and the moving average. Volume is displayed as colored bars, using red or green strokes depending on whether the close is above or below the open. The visualization is built with D3 and the d3fc library, using SVG rendering and a CSV data source.

CColinEberhardt
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Yahoo Finance Chart Step 4 - Moving Average

This example shows a Yahoo Finance intraday chart for a stock, combining an area series of opening prices with a blue line and a red exponential moving average line, plus gridlines. The chart uses the d3fc library’s `fc.chart.linearTimeSeries`, `fc.series.area`, `fc.series.line`, and `fc.indicator.algorithm.exponentialMovingAverage` components, all rendered as SVG. Data is loaded from a CSV file via `d3.csv` and parsed into date objects. The moving average is computed over a window size of 20 on closing prices, with axes configured to display time and price.

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Yahoo Finance Chart Step 8 - Callouts

This example demonstrates a Yahoo Finance chart of stock prices, using an area and line series to show the opening price over time, with a red moving average line overlaid. The chart uses D3.js with the d3fc library, rendering to SVG. It highlights the final values of the close price and the exponential moving average using styled callout annotations with labels. The data is loaded from a CSV file, and volume bars appear below the main time series, colored red or green based on price movement.

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Yahoo Finance Chart Step 13 - Vertical Bands

This visualization shows a Yahoo Finance candlestick chart with a high-low range area, a 20-period exponential moving average, and volume data, with trading hours handled via a custom discontinuity scale. The chart uses d3fc components for the time-series layout, annotation lines, and legend, while the crosshair feature displays tooltip callouts for price and time values. Data comes from a Yahoo Finance JSON feed and is filtered to regular trading hours, with the full SVG rendered using D3.js.

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Yahoo Finance Chart Step 12 - Discontinuous Axis

A Yahoo Finance stock chart displays OHLC (open, high, low, close) data as a time series, with an exponential moving average (EMA) overlay and a volume subplot. The example uses a discontinuous axis via the `fc.scale.discontinuity.tradedHours` provider from the d3fc library, which compresses non-trading hours. Built with D3.js (v3.5.5) and d3fc, it renders SVG elements, including an area gradient, line annotations, and crosshair callouts. Data is loaded from a static `yahoo.json` file, with the time axis filtered to trading hours (7 AM–7 PM).

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Yahoo Finance Chart Step 6 - Volume Chart Decorated

This example presents an intraday Yahoo Finance chart that combines a decorated price series with a volume chart. The price panel shows the open price as a gradient-filled area, a blue line, and a red exponential moving average (EMA), all overlaid with gridlines using the d3fc library. The lower volume panel renders bars colored red or green based on whether the close price is above or below the open. The chart uses d3.csv to load the data, d3.time.format for axis labels, and d3.svg to render the SVG output.

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Yahoo Finance Chart Step 10 - Crosshair

An interactive Yahoo Finance chart rendered in SVG displays the open, high, low, close, and volume of stock data over time. Users can hover to reveal a crosshair overlay showing the exact date and price, with a legend updating to reflect the value under the cursor. The chart uses D3.js and the d3fc library, with a custom `fc.tool.crosshair()` component and `d3.scale.linear()`. Data is loaded from a CSV file with timestamp, price, and volume columns, and includes a 20-point exponential moving average.

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