I know what you are saying and a more accurate way may be to...

I know what you are saying and a more accurate way may be to track market cap rather than stock price. So I get that point.

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To keep it simple, and also to look from a different angle - from the eyes of the punters holding the stock, for whom share price is most important, as that tells them where they stand, instead of where the company stands.

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Secondly I use a loose bracket of 15 to 20% as zones to get overall sentiment. So first 20% is within weakness, so roughly 128 zone from it's low for ALB. It's not an exact science and does not mean over 128 suddenly big things may happen, so rather use it as sentiment and also when and how to play, for myself. May not be best and others may have different opinions. Let's see how it plays out.