Lotus Information Network Corp, the company’s Dataspeed acquisition in San Mateo, California has a new release of its Signal personal computer-based investment quote services, which delivers real time data on over 40,000 shares, options and commodities via FM radio in the US. Signal 2.1 offers complete compatibility with DESQview 2.2, and also adds features and data for futures and options trades. Futures traders can now get open interest and volume on futures contracts, data considered essential by many active traders, so that it now offers all futures data in real time. Open interest on index and equity options is now available, and a new feature enables options traders to change some or all of the expiration dates in their portfolios with a few keystrokes – which should, suggests Lotus, save heavy traders an hour or more of rerkeying every month. Signal 2.1 sells for $600.