The fainter rectangles in the chart are the number of that type of order given on each day. If a state has both a lockdown and reopening order they will be displayed in each with the same color
The Lower half of the chart shows the lockdown orders per date, and when a state is selected it will appear with a circle in the date it issued an order. These also correspond with the circles in the Covid-19 Trajectory chart
The Upper half of the chart shows the reopening orders per date, and when a state is selected it will appear with a square in the date it issued an order. These also correspond with the squares in the Covid-19 Trajectory chart
The Right hand side shows states which are missing orders for each order type