I have. My current pairs I keep on my charts are the EUR/USD, EUR/JPY, AUD/USD, USD/CAD, GBP/USD, USD/JPY, USD/CHF, EUR/AUD, EUR/GBP, EUR/CHF, and GBP/CHF. I have taken trades on many pairs besides the CHF, as I am often impressed with their spreads but haven't gotten a feel for its movement...