I think both have their own importance as GDP is the key factor which affects the strength of the currency and interest rate does the same as well. So you have to keep an eye on both. Do you agree with me?
Both have their own importance on the Forex market but interest rate has huge impact than the GDP Growth rate. Inrerest rate is the first thing that comes into the mind of the investors when they try to put some eggs in currency basket. You must be well aware of the economic data and its impacts while trading.