Open, High, Low, Close
Every bar answers four questions for its timeframe:
- Open — first traded price when the bar started.
- High — highest price during the bar.
- Low — lowest price during the bar.
- Close — last price when the bar ended.
Why close matters
Many traders weight the closing price heavily because it reflects where the market settled after all intrabar volatility. Indicators such as moving averages use close prices by default.