Um...human beings cannot read order flow fast enough and neither can a computer at your house or office.

If you are colocated that is great and a machine reading the trade matches as they are matched in the pico second would help you but even that is latent.

You also are mixing up imo.. order flow and order book with time and sales possibly because you failed to mention that we have hidden iceberg orders as well which number 2 to 3x the Limit order book.

Also there are millions of orders that are sent to the market as mit etc and stops that you do not see on the CLOB. This crazy infatuation with jigsaw type crapola doesn't help anyone with their trading success.

Where are all the jigsaw millionaires. There was a time when reading the order book mattered because it was slow and orders were sometimes held as well as you knew the offering or bidding party but not anymore.

On the trading floor if a guy offered 1000 at this price then he would honor it because no one would trade with him ever again if he didn't. But now a days electronic clobs are never wysiwig!!!!

Best I can help you is take volume and range over certain time periods say 10 seconds and build on your ratio idea of the amt of volume it took to move x amount of points. I have found that low volume areas are where price moves ridiculous amounts instead of high volume battles.

Uh humans too slow to read a 30 minute footprint bar?

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Um...human beings cannot read order flow fast enough and neither can a computer at your house or office. If you are colocated that is great and a machine reading the trade matches as they are matched in the pico second would help you but even that is latent. You also are mixing up imo.. order flow and order book with time and sales possibly because you failed to mention that we have hidden iceberg orders as well which number 2 to 3x the Limit order book. Also there are millions of orders that are sent to the market as mit etc and stops that you do not see on the CLOB. This crazy infatuation with jigsaw type crapola doesn't help anyone with their trading success. Where are all the jigsaw millionaires. There was a time when reading the order book mattered because it was slow and orders were sometimes held as well as you knew the offering or bidding party but not anymore. On the trading floor if a guy offered 1000 at this price then he would honor it because no one would trade with him ever again if he didn't. But now a days electronic clobs are never wysiwig!!!! Best I can help you is take volume and range over certain time periods say 10 seconds and build on your ratio idea of the amt of volume it took to move x amount of points. I have found that low volume areas are where price moves ridiculous amounts instead of high volume battles.

I have a different definition of order flow than market depth. I don't even have a subscription with market depth. Don't use it at all. My theory is that the depth of market is too easily susceptible to manipulation. I also cannot beat the speed of algos.

However, what I can do is see what orders transacted at what price, because that cannot be easily hidden and/or is not remarkably affected by dark pools in a very liquid futures contract. What orders were transacted at a given price and time are part of order flow as I define it.

The OP wants to know if there is an indicator that considers a number of factors to determine if the delta is strong or weak relative to price. I think that is really subjective because what is strong on one instrument will be nothing to a different one. Also, strength or weakness will be very relative to market conditions.

For me, when skewed in the same direction as price AND price is moving with it, that's strong delta relative to price. If delta is heavily negative and price is moving up, that's a divergence that deserves watching as delta is not strong to price and there will be some information present when the delta and price match.