This graph shows two measures of lumber prices: 1) Framing Lumber from Random Lengths through Feb 28, 2020 (via NAHB), and 2) CME framing futures.
Right now Random Lengths prices are up 15% from a year ago, and CME futures are up 4% year-over-year.
There is a seasonal pattern for lumber prices, and usually prices will increase in the Spring, and peak around May, and then bottom around October or November - although there is quite a bit of seasonal variability.
The trade war led to significant volatility in lumber prices in 2018. Recently prices have been picking up, but the futures fell sharply last week - probably on concerns about the impact of COVID-19.