Mercury speed phases (stationary and retrograde) was closely observed by W. D. Gann in order to determine potential trend changes, in BTCUSD we can see some turning points close to the speed dips (when Mercury speed cross the zero line). However, what looks more interesting is that when the Mercury speed is accelerating the price range of the candles is larger, is the same pattern that we noted with the Moon speed indicator so we can conclude that speed acceleration periods produce more intense effects when Mercury aspects occurs.
Note: The Mercury speed indicator is based on an ephemeris array that covers years 2010 to 2030, prior or after this years the speed is not available, this daily ephemeris are based on UTC time so in order to align properly with the price bars times you should set UTC as your chart timezone.