An accessible guide to the pairs trading technique A leading arbitrage expert gives traders real tools for using pairs trading, including customizable Excel worksheets on CD. Mark Whistler (Denver, CO) is the key developer of pairstrader.com as well as a licensed securities trader and broker and leading arbitrage expert.An accessible guide to the pairs trading technique A leading arbitrage expert gives traders real tools for using pairs trading, including customizable Excel worksheets on CD. Mark Whistler (Denver, CO) is the key developer of pairstrader.com as well as a licensed securities trader and broker and leading arbitrage expert.