Citi's updated estimate of this month-end fixing model point to moderate USD selling into tomorrow's fix.

"The signal has changed to a moderate USD sell.. The strength of this month’s signal is below the historical norm, measuring 0.4 standard deviations on average," Citi notes. 

"The discrepancy between the JPY sell and buy-signals for other currencies suggests that EURJPY, GBPJPY and other JPY crosses may also move higher ahead of this month-end," Citi adds.