Multi Series Candlestick chart are useful when you have to compare two or more data sets, each containing data points representing open, high, low and close values. Candlestick Graphs are mostly used to represent stock price, foreign exchange, commodity, etc. Given example shows stock price comparison of AT&T vs Verizon in 2016 using Multi Series Candlestick Chart. It also contains source code that you can edit in-browser or save to run locally.
Data souce: In code.
Docs: https://canvasjs.com/javascript-charts/multi-series-candlestick-chart/