DTN Market Access Historical Data accounts are available directly from Linn Software for $15/mo. This historical market data service can be used in conjunction with both the DTN Satellite, opentick, and Interactive Brokers Real-Time versions of Investor/RT to provide on demand backfill of charts with daily, weekly, monthly, intra-day bar and tick data. You can use DTN Market Access as your primary data source or use it in conjunction with a real-time data source.  DTNMA is strongly recommended for both IB and opentick users, as a faster, more reliable, and more robust alternative for historical backfill.

For users of the Interactive Brokers or opentick versions of Investor/RT, DTN Market Access historical service can be used as an optional feature to supplement the limited historical backfill available directly from the those feeds. When you have this service enabled your Investor/RT registration code will have both an data feed id and a DTN Market Access id, e.g. U123456/LIN357 (for IB). Investor/RT chart windows automatically access the DTN Market Access servers to backfill daily, weekly, monthly, minute interval, and tick data charts. Intra-day historical data for the preceding 120 calendar days is available from any Investor/RT chart, or from the Data Download window.