Order cancelled
⋅ Ok, so I discovered belatedly that TradingView does not correctly invert forex crosses, which makes the above chart useless.
Xau.Usd / Usd.Cnh should be the same as Xau * Cnh, as the Usd cancels out. This does not happen with TradingView.
I did not spot this at first. the reciprocal is closer to 8,500 than 211.
Thus the original rationale is not valid