I would say that EUR had flash crash , not dollar. There are no spikes on NZDUSD, USDCAD, but are all on EUR and CHF.
Dollar Flash Crashes On Last Trading Day Of 2016
It is oddly appropriate that in a year everyone finally admitted markets are manipulated by central banks and broken by HFT algos, that on the last trading day of 2016, the dollar flash crashed with for no reason whatsoever. Shortly after 6:30pm Eastern, the dollar plunged by 150 pips against the Euro, once 1.05 stops were taken out, with algos sending the EURUSD as high as 1.07 in a matter of seconds...... while concurrently the Swiss Franc soared as much as 1.6% against the greenback, as the USDCHF tumbled from just over 1.025 to just above 1.0050 as the pair briefly flirted with parity.