Steam Winter Sale has started (10 year anniversary of their winter sale)

https://store.steampowered.com/
December 20, 2018 through January 3, 2019
Do new games get discounted through out the duration of the sale?

• Yes, typically. You have to check every day to see if the game(s) you want are on sale. They often do a wrap up at the end with all or most of the sale prices, but no guarantees…

Any way to see price history, so we know if it is a true slickdeal?

• You can check this site, which is kinda like camelcamelcamel for steam games: https://isthereanydeal.com/