Some of our most successful "danger zone" warnings have been on overvalued cloud software companies, i.e. Demandware (DWRE) and Splunk (SPLK). This week we’ve identified another highflying cloud company that exhibits many of the problematic traits we saw in DWRE and SPLK. Revenue growth can only support a stock for so long and this week’s "danger zone" stock, Marketo (MKTO) has plenty of room to fall.