Well, in his favour, the book lays out a fairly complete history of the relevant events, with charts, basically from around Bretton Woods to ~2008. I suppose you could say that his explanation for the observed events is only one hypothesis, but some of the graphs at least are quite striking, i.e. in highlighting correlations, or at least, associations.
Something I hadn't noticed on previous readings that I only just noticed was corporate bond yield spreads (spreads between high-yield corporate bonds and US bonds of the same maturity.) It is apparently one of the indicators of risk aversion and correlates well with the VIX. i.e. when conditions are growing uncertain, and there is more risk of the bond defaulting, then the yield has to go up to compensate.
One of Ashraf's more impressive calls was the long fall of the euro in 2010, which he first talked about (I think) in 2009, and repeated consistently, before anyone else that I happened to notice. I seem to remember this was partly based on yield spreads, and partly on Commitments Of Traders, and probably a few other things, and he usually threw in a few technical indicators. Anyway, I made money on that. Unfortunately, at least as far as I could see, he didn't predict the turnaround half-way through the year, and once it had happened and was obvious to all, he didn't offer any explanation that I noticed. I was a bit disappointed about that (the lack of explanation). Some of his gold calls were also a bit mixed. He's definitely not infallible. But as I always say to people about him: the calls aren't important really. What's important are the reasons he gives. If you agree with this analysis, fine. If you can see flaws in his analysis or are aware of factors that he hasn't taken into account, then you make your judgement accordingly. The other important thing is that he can make you consider things that you might not otherwise have thought of, left to yourself. Anyway, I think a period of silence on my part would be most welcome 😆 especially on this subject.