Rollover Interest

I haven’t seen this topic discussed in quite some time. Has there been any advancement on adding the ability to account for rollover yet? My system is dependent upon the value of rollover when representing proper results. I understand that each broker gives a different value for rollover, but one example, at least, would be very beneficial to those of us who are trying to develop systems that hold trades for much longer periods. I believe C2 could benefit from these types of trading/investment systems if rollover could be accounted for.

Look forward to your response.