I've not had a chance to read this entire thread, just the first two pages so forgive me if you've already established everything I'm about to say!
My interpretation of order flow is very simple; it's defined by the market liquidity.
This is described on a chart as a trend in a range and consolidation in a range or: range, to trend, to range.
Rinse and repeat.
Trend is defined by the move long or short out of the previous range; the time frame is irrelevant.
Ranges are often drawn on charts as trendlines (diagonals) or S/R (horizontals), ranges can form inside other ranges and 'break-out' to fill the upper and lower scale of the outer range. Typically when breaking long the former range now becomes support and when breaking lower the range now becomes resistance.
Ranges should not be confused with consolidation; consolidation in my mind is liquidity 'balance' where price condenses (this can be as small as 10 pips or larger than 100) along the horizontal with an upper and lower limit defined by pivots - the classic 'rectangle' price action.
How to trade liquidity varies wildly on your money management, risk/reward levels and preferred time frame.