Hi FXX,
fwiw here are my thoughts after pondering about the subject.
Struggling with the sentiment indicator because it is difficult to gauge as it is subjective imo. Also because the subjective analytics varies depending on where one is within the economic cycle.
For example when interest rates are low ie at 0.5% then a 25 basis points is effectively a 50% change moving up to 0.75%. Compared to when moving from say 2% to 2.25% effectively a 12.5% move.
Then it also depends on when the change takes place on the economic cycle.
So a .25 basis point move in the trough can be more significant than a .25 move during expansion or at the peak.
How one would measure impact, significance and sentiment is variable. The BoE will have models where they'll be able to forecast change in various measures of the Money supply Ms but they are kept private as far as I know. You may find other studies online depending how deep you wish to look into it. I usually just look at how the dynamics are applied and never thought about precise impacts or measuring sentiment. You may with respect to interest rates look at different measures of the money supply. ie M0 M1 M2 etc.
Same would apply to inflation and BoP and exchange rates. Then there are real and nominal interest rates and they all go into the mix in determining exchange rates. Numbers one thing but sentiment is very hard.
One suggestion that might be possible is to look at are candlesticks and ratios. I'm thinking along the lines of wavelength and amplitude ratios. So you could look at various time frames prior to announcement or change in news and then subsequent brake out range or amplitude and establish ratios applying same criteria. It may be possible to carry out backward testing. You can then build a picture of past moves.
Bulkowski has a few books on chart patterns with much statistics on %percentage breakouts from various setups and statistics around probabilities. You might find it an interesting read. However, he looks at technical chart patterns rather than news. I suspect that those breakouts occur as a result of CB changes or news announcement but he focuses more on stats and chart patterns.
As before I would add to that due consideration of economic cycle and where we are on that curve which will change impacts or sentiments.
The latter part of trading on pullbacks is also tricky and risky as you say but here I thought of simply approaching the problem by studying Elliot Wave and Fib retrace
levels. Assuming these TA methods hold water by virtues of people watching they converge. I would say this is more to do with how the market and business analysts value fundamental changes and prices moving towards equilibrium but easier to study price movement and convergence to levels in terms of technical charts.
I use Pivot Points my self and those same pivot points often converge to Fib levels and those areas become very strong R/S levels.
You may see Dentists PF charts as well and irrespective of time it is very clear to see key levels of price convergence where congestion is highly visible.
So if you are looking for pullback S/R levels Fibs, PF charts, EW and PPoints are tools that help me identify them. Start looking at long TFs like monthly and then drill down to your TF; weekly, daily, 4H 1H and 15m etc. Higher Time Frames carry greater significance.
Thank you for your posts which are really good and helpful and I do enjoy reading and reflecting on them. That's it from my perspective.
All the best [emoji106]