You should use the closing spot exchange rate on the OANDA website on the last day of the period for which you have claimed earnings in that currency.

Can somebody help me out, please?

I have the necessary points to apply for the Tier1 General visa as a highly skilled migrant. Now my problem is that I'm not sure which supporting documents should I provide. I would appreciate if someone would help me out. 1) I have a university degree which is found in NARIC's database, however it ...