On January 15, the Swiss National Bank took an unexpected decision to remove the currency cap on the EUR/CHF pair which had been at 1.2000 since 2011. The currency market showed an unexpectedly stormy reaction to this event which had not been anticipated even in the central bank itself.
After the SNB's decision was released, the Swiss franc strengthened dramatically. The GBP/CHF currency pair dropped by 3933 pips in half an hour. By sell trades, the profit was up to $67 000, with trading one lot!