Currently if a timeseries called MARKET_VALUE (MarketDataRequirementNames.MARKET_VALUE) does not exist , then security or portfolio is not linked to the timeseries. I feel checking for existence of any timeseries related to the security and then displaying it , would be the best. Or at-least a configuration variable to decide which timeseries should be linked will also be good enough.
I will get someone to investigate under JIRA PLAT-2712. It has been assigned.
That issue is now resolved in the develop branch, it should show all time series associated with a given security now, not just MARKET_VALUE.