Bear in mind, Obama went into office when the economy was at its worst, there really was no where to go but up. Anyone who was elected would have taken the advice of the top economists in the country. It was Ben bernanke and a few others that formulated the stradegy. The fed buying treasuries at a rapid rate kept rates artificially low and fund managers and mutual funds searching for yield start to seek out riskier investments such as stock. Portfolio's started to recover giving americans confidence and credit began to thaw out. It really had nothing to do with Obama.
Trump on the other hand can make the economy stronger and create QUALITY jobs not low quality jobs that make the unemployment numbers look better.