The first graph shows number of actual sales in Allen, Carrollton, Frisco, Little Elm, McKinney, Plano, Prosper, Richardson, and The Colony. These are the areas that I focus on. It seems number of sales is not really affected by pandemic, so why a big price jump.
Second graph shows total inventory available. So in 2019, inventory was almost triple the number of closed sales. Good news for buyers is that inventory seems to be increasing slowly now.