EFS does not have access to historical bid/ask data. EFS can only collect the data in real time and display it going forward. In order to redisplay this collected data you would need to incorporate some functionality into your EFS using File I/O to save the data to a text file. You would then need to create a routine to open and read the data from the text file and return it to the chart during the loading or reloading of the EFS.
Jason K.
Project Manager eSignal - an Interactive Data company
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