Asking questions about prices is not a rule violation. HSX does not like when a "call to action" is made. For example: "I think MOVIE is priced too low at $25, I think everyone should buy it." OR.."MOVIE is priced at $25, this movie is going to bomb..and not make to $20 opening weekend, I think shorting it is better."
However, IF you give REASONS as to why you think a movie will do well like "This star was just signed to MOVIE, plus a new director was added, so I think it will hit $50"...typically HSX has allowed this type of post IF you are basing your reasons on facts or links to a news story by THR, etc.
Historically, HSX has allowed "gut checks" on the day a movie opens which lets players state whether they are shorting or longing the opening movie(s) which also doesn't really have a "call to action" like the example above.