Hi , Please advice me on these issues. I highly appreciate your help and mention of your experiences in similar efforts. I am looking for 'one minute' data for ES (S&P e-mini) and Crude OIL CL future contracts for last 2 years. I am planning to use this data to beck test 'spread strategy trading opportunities' , I noticed manually many 'repeated spread patterns' between ES and CL future contracts and I wanted to back test and find 'reliable and profitable ' patterns . I will be employing Amibroker for this back testing as I found it as one of powerful programming platform. 1) who are the good vendors providing ES and CL future contracts 1 minute data ( historical 2 year period) their pricing 2) how hard is it to capture 1 min data from these vendors for 2 years worth of data into flat /text files. 3) given these ES and CL are future contracts with many expiry months , how to handle all the different month symbols ? do we need to use API call with programing code ?