In the heart of the Motor City — a town not known as a hotbed for insurance innovation — a young company called Signal Advisors is hard at work. Patrick Kelly, 31, now the co-founder and CEO of Signal Advisors, started his career as a financial advisor. In just a few short years, Signal Advisors has managed to raise tens of millions of dollars from some of the nation’s most successful entrepreneurs and investors. So what is the secret to Signal’s success?