Plot interest rate data.

Anyone able to help me with this;

I have interest rate data in CSV-format. I can import this without problem, but how can I get Amibroker to fill every (week-) day between the rate changes with the prevailing rate. If I just import it as is I will only get data points on the days of rate changes.

I have tried to figure out an easy way to do it in Calc (Excel), but it would require a lot of manual entering of data.

Any suggestions?


Thanks.