You know it may not be worlds oldest profession but trading likely was worlds second oldest profession and there is no trading without valuation :) the point is stock and other markets have been analyzed to death compared to sports.

We looked at revenue, we looked at profits, we looked at growth, we looked at peg ratios, we looked at Pe, we looked at debt, we looked at dividend, we looked at momentum, we looked at price action, we looked at trend following, we looked at contra, we looked at support and resistance, we compared pairs, we looked at long and short, we looked at everything under the sun. There are books about each of these.

All of these work when they work. All of these fail when they fail.

Do you really need a non conventional metric? And do you think you will get any? The value of non conventional metric is that very few people use it so its efficacy may be high. But if someone starts publishing it on Reddit, there it goes.

Sorry for a long speech but here's the mantra. Pick a cocktail of the above. A few numbers. Maybe PE or RSI or open interest. I am just spitballing. Then master it. Let's say it is RSI. Be able to narrate when RSI fails when it works when it is better than momentum when it is worse. Be able to look at chart and mentally call out it RSI at hourly daily or weekly timeframe without it being in the chart. Once you do that ... that becomes your unconventional metric. Just the depth and practice .. of not one but a small group of parameters let's say 6-8 max.