Pairs trading is an established trading strategy for hedge funds and alike. It is a relatively simple trading strategy that presents two distinctive phases. First, it identifies pairs of securities that are related using one year of historical data. Second, it trades for six months the underlaying securities of the pairs whenever the spread of the pairs exceeds certain value, usually two times the historical standard deviation. In my latest manuscript I conduct an empirical research of pairs trading algorithm to study its behaviour and fundamental characteristics. Likewise, I compare the results with the standard benchmarking Buy-and-hold strategy using SPY contact. I find particularly interesting the conclusions for retail and institutional investors