"Intra day" means changes happen in a days trading the 
opposite is called as "Interday"

INTRADAY TRADING
Another way of saying "within the day". Intraday price 
movements are particularly important to short-term traders 
looking to make many trades over the course of a single 
trading session. The term intraday is occasionally used to 
describe securities that trade on the markets during 
regular business hours, such as stocks and ETFs, as opposed 
to mutual funds, which must be bought from a dealer.

INTERDAY TRADING
interday is nothing but not sqaring off ur position on the 
same day , or taking delivary

Intraday trading refers to opening and closing a position 
in a security in the same trading day. This can be buying 
and selling to capitalize on a potential rise in a 
security's value or shorting and covering the short to 
capitalize on a potential drop in value. Intraday traders 
capitalize on small moves in the value of a security by 
using "leverage" or "margin", which basically means 
borrowing money. Most day trading accounts are allowed to 
take an initial position in a security that is 4X the value 
of their account (per securities regulations), but some 
professional accounts get more leverage (i.e. 10X). For 
instance, a day trader with $10,000 in his/her account can 
take a $40,000 position in a security for day trading 
purposes. This amount is not allowed to be held overnight 
(only about 2X the value of the account can be held 
overnight per securities regs). The leverage inherent in 
day trading allows small gains in a position to yield 
meaningful profits (and losses). Most day traders are very 
strict about cutting losses with "stop loss" orders. This 
limits the potential downside (but not the upside) on any 
particular trade, hence the adage "cut your losses short 
and let your profits run". With this basic strategy, a day 
trader can be wrong on 50% of his/her trades and still make 
good money. Day trading styles vary from "scalpers", which 
take positions for only a few minutes, to holding a 
position for most of the day. Some day traders are momentum 
followers and jump onto any given move, while others try to 
identify intraday reversals. Virtually all day traders use 
technical analysis (stock charting) heavily in their 
decision making.