you’re welcome!! <3 and yes, of course. the ot stands for only true and then the 5 for all the five boys of one direction. so that means that you are a fan of all five of them. ot4 related to one direction means that the person thinks of one direction without one of the boys (mostly zayn or liam). in nicer context, ot4 stands for the group 5 seconds of summer (they were found as a cover band on youtube by niall and louis and then became their opening act before owning their own fan base). there is aswell the term ot9 thats when you stan one direction and 5SOS.
i hope this helped a bit :)
