SOPR (spent output profit ratio) is a metric, provided by Glassnode to measure if most BTC are moved in profit or in loss. The higher SOPR is, the more profits are realized (theoretically) and vice versa.
This indicator shows SOPR visually as a heatmap directly on the Bitcoin chart.
Cold temperatures (blue, purple) show bear markets. Bear market peaks should be visible in dark purple. Hot temperatues (yellow, red) show bull markets. Hype phases should be visible in red.
I recommend to hide chart when using the indicator. Otherwise you can also enlarge the heatmap in the settings.
The indicator works best on BTCUSD standard charts on daily timeframe. Otherwise you will see an error message.