Wall Monitor signals are one liners that give all the
relevant information that is needed to know about the wall notified. Perhaps
the part most confusing for newcomers is the last amount in parentheses.
This amount, which varies from 0% to 5%, refers to how far
was the wall placed from the top offer in the book.
For example, if the top offer from buyers (or bids) is $100
and someone places a huge buy wall at $98, then the value in parentheses will
be 2% (since the difference between $100 and $98 is $2 or 2%)