How to handle symbol change

[NC]

I am trying to figure out how to handle when the symbol for a security changes. For example, a lot of Canadian Income Trusts are changing over to corporations. This results in the symbol changing from a .UN-TC to just -TC.
For example, ALA.UN-TC recently changed to ALA-TC.
So when I graph ALA-TC I don't get much data, however when I graph multiple symbols it looks ok, but does not work for moving averages and other studies. Is there a way to tell esignal that this is the same security and for it to be handled as one?

Thanks,
NC

[eSignal_AveryH]

Generally we received notice of symbol changes from the exchanges. However if you come across a symbol that's changes and we have not updated or merged the old symbol with the new you can send a request via Questionable Price Link or click on Report a Questionable Price under the Support menu in eSignal. Once received our Data QA will verify the report and make the necessary correction with merging the data together.