Check out https://cryptowat.ch/ for your primary charting website, They have all the major coins and exchanges as well as some not so major coins and exchanges. Also pretty powerful charting software and tools for technical analysis and trend plotting.
Try it out and post questions or comments I will be happy to try and help you use it or learn new functions.
Back to the title of this post. A neat seasonal touch they added to the charts is snow flakes that will fall through the chart.