The investing term "charting" usually means people who invest based on price history of investments. When they see a low point, a surge to a stable level, and then a return to the low point, they say this is a "head and shoulders" and they invest based on how they interpret it. So "charting" has some additional meaning when we're talking about investing. I don't use "charts" in the sense of price history.
I actually think the relative percentages of my investments is the most critical thing. So I use Google Sheets to show me what percent in bonds, in stocks, in international versus domestic stocks, etc. A more detailed page shows the need for rebalancing, in dollars and a percentage. My goal becomes keeping it balanced, which in turn maintains the level of risk that I set up.
When curious, I use Vanguard's tools to tell me my portfolio's performance (YTD, last year, 5 years, etc). I also occasionally run "Portfolio Watch" to see which risks I'm taking by allocating differently than the total stock market. I prefer to see those risks, rather than be unaware of them.