Is it possible to "tag" or otherwise persist my own metadata along with a trade transaction?  I think QC prohibits me from writing to my own data files.  My concern is for the case where I'm running a single strategy but have mutliple positions open (say it's an earnings play), and the server/algorithm crashes and it needs to reboot, I want to recover additional meta data I might have been using inside the algorithm.  Or, is it expected that anytime an algorithm starts up if there are open positions that it needs to be able to re-calculate any  pre-existing metadata that might have been associated with any of those trades?