Hi Michael!
I suggest you use the funnel chart type for this rather than the session chart type.
You can set the first event of the funnel as “start session”, and the second as “purchase”. This will give you the conversion rate aggregated over a time period, and you can switch to “Conversion over time” to see it broken down by day/week/month.
Hello - thank you for your response. I am looking for “start session” in amplitude but not seeing that in the funnel chart.
If your product is mobile, you can configure this on:
https://help.amplitude.com/hc/en-us/articles/115002323627-Track-sessions-in-Amplitude#h_40274f84-1fa1-4eb9-8c0e-252ff5313654
If your product is web / using the javascript sdk, start session is not fired, so I would recommend instead that you put another event as the first event (e.g. pageview) and then look at the conversion rate on daily basis using the conversion over time tab.