Rhythms

Markets that turn together. A rhythm group is a set of markets whose cycles have the same length and stand at the same point today, so they peak and bottom at about the same time. Where a group stands is its phase, shown as a clock: peak at the top, trough at the bottom (as on How it works). Two groups can have the same length and still turn weeks apart, like two clocks running at the same speed but showing different times. The date beside each market is the turn of this rhythm alone. Markets and Calendar add a market's rhythms together, so their date can differ by a few days.