Market data,
explained plainly.
The concepts behind the numbers: what a price bar records, and why adjusted prices matter for every backtest.
What is OHLC data
What is OHLC data? Open, high, low, close and volume explained, with candlesticks, intervals, how a daily bar is formed and a worked example from real bars.
Adjusted prices
Adjusted stock prices explained: how split and dividend adjustment factors work, why backtests need them, and how to request raw, split or total-return bars.