The reason he said he went outside to watch the Presidential Parade was that he went outside to watch the Presidential Parade!
"P.Parade" = " Pre - Parade" 
The hastily written single cursive letter "
P" followed by a full stop "
.", could stand for the abbreviation "
Pre -"
At no time on the notes, as falsely stated regularly by the claimants, is Oswald recorded as using the word "
Presidential"
There is no proof by the claimants, that the letter "
P" stands for the word "
Presidential"
The letter "
P" could mean that Oswald is telling them that he was outside for a very short period "
Before" the shooting, to view the "
Pre - Parade"
"P.Parade" = " Pre - Parade"
Simple Really 
