over the period it discovers minimum and maximum values
all the values within the period are normalized to that range
resulting values are in range 0-100
the shown value is average from all the candlestick data, i.e. AVG(OPEN, HIGH, LOW, CLOSE) resulting in more smoothed values which helps to filter out market volatility
How to interpret
if there is a uptrend, the new candle data will be normalized as one of the highest values, around 100
similarly if there is a downtrend, the new candle data will be normalized as one of the lowest values, around 0
to help visualize, there is a configurable threshold for bullish or bearish trends
works well on higher timeframes, e.g. BTC on 1d, but can be used on any timeframe to identify local trends
even though a lookback period of candles is used to define the normalization range, this does not mean that the indicator is lagging - this is because the lookback period only defines the range, but does not influece current value's weight
Configuration
you can configure bullish threshold as well as bearish threshold and respective colors