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Put Average of Valuation Metrics like Average PE, P/S, etc over the last 5 years.
Median sometimes is too volatile especially if they are jumping up and down all the time through the years.
Customer support service by UserEcho
We've looked and tried avg and med a lot, and they both have weaknesses.
AVG will show an even more incorrect number if there are big jumps. That's why we ended up using MED.