This Bitcoin indicator shows the percentage that the exchange traded volume is from the sum of the exchange traded volume + on-chain transaction volume.
The thin red line is the non-smoothed value calculated from daily volumes.
The thick black line is the 7-day EMA-smoothed value.
The exchange traded volume and the on-chain transaction volume are reported by Quandl and have a 1D resolution - so it is best to use this indicator on the daily time frame.
When the value is high, it shows the the interest of traders is high and they are intensely trading BTC. When the indicator is low, it means that BTC is "dormant": it is used for transfers, but not so much for trading - traders forgot about it for a while - which may be a good time to accumulate if the economy is in a general bull market.