I have found some useful FX sentiment indicators
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sovereign CDS spreads. this is an indication of the risk of a country defaulting on its debt. the higher the spread, the more likely the default (and a downward pressure on the currency. find them at CDS Movers
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currency futures- found every Friday at CFTC Commitments of Traders Report - CME (Futures Only)
the changes in long vs short positions, for both non commercial and commercial traders… -
volatility skew in FX option prices. when the market maker implies higher volatility in calls than puts, they are anticipating a rise in the pair…you can getv this data with a demo acct at Saxobank (one of the few market makers in fX options)
I track all this and much more (current acct balance, budget balance, etc) in my weekly briefing.