ctime is not a keyword in prt language, it’s probably someone’s chosen name for a “c”ondition on “time”, there’s no particular clarification to bring on how it would be used. At most, when reading the code, there’s only seeing what it does within this specific code as intended by its author. Most likely it was used within an “if … then” statement for a specific purpose and that doesn’t necessarily mean trades can’t exist outside of it (example: used for entry, but not necessarily for exit before it ends).
Color code in the code editor can help to see quickly what’s part of the language and what’s just a variable. To see if it’s a keyword, typing the word in the “terms search” box there can help too: https://www.prorealcode.com/prorealtime-documentation/
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