Thinkorswim Legacy
Thinkorswim Legacy Import - for trade history data up to August 15, 2011 TD Ameritrade has made the Thinkorswim / Penson Historical data available on its website. For trade history after August 15, 2011, please use the TD Ameritrade import filter. Update (May 2014): We have been advised that Penson historical data prior to 2011 is no longer available.