Here's what the DTCC have listed for today 20 May 2016
I have flagged the large USDCAD expiries all week. Still in play as is large GBPUSD interest now at 1.4600 and NZDUSD at 0.6750-52/0/6800
Remember that these are "vanilla" options so still in play right up to expiry at 14.00 GMT even if breached in the meantime.
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