Why trade in early part of the day?

Early birds catches the worm.
The morning session of trading is the most profitable time of the day where liquidity is abundant with the buyers and sellers which provides the volatility.Any overnight positions held can be stop running.The imbalance of orders will result in a "bounce"
The beginning of the day's trend or counter trend can be immediately identified in the event there are optimistic or pessimistic news events impacting the markets.
Profits won can be protected and later move in to a smaller position.Try to capture the scalp,take the money and leave.You still have the afternoon.Mistakes can quickly be rectified.Any loss taken later in the day is harder to recoup due to time constraints.

Time and Price.
When the time is right,the price will move.Most trades are profitable almost immediately.If there is no positive moves,you opt to be wrong.By using time and price,your trading will improve.

Trending and non-trending.
Accept the notion that the market is often trendless so shift psychology 180 degree.The big day comes on the heels of a non-trending day.They are quiet in advance of any importamt news report.Sometimes they're quiet in the morning and trending in the afternoon.The opening price should provide some clue.

Volatility.
It's the clue to the kind of trading day.Market rarely goes quiet after a chaotic open.It also offers a fading chance.

Act On Knowledge.
Always train yourself to act.Try not to miss all the good trades and ensure bad ones will not occur.

Rules of the Gaps.
On LOWER gaps,look to SELL in the gaps.
On HIGHER gaps,look to BUY in the gaps.
On SHARPLY LOWER gaps,SELL IMMEDIATELY.
On SHARPLY HIGHER gaps,BUY IMMEDIATELY.

Opening Gaps.
When filled may be trendless,when not filled often trending.

Gaps and time.
When unfilled after ten-minutes,you often have a trend.GAP is a powerful magnet.LOOK to enter in first 30 minutes of trading and if possible sooner.
You will often know if you are correct immediately.
"Better to embrace chance than chase"

Putting STOPS.
It's a bad idea in early going and can be a bad idea entirely.Price swing of 100 points are uncommon nowadays.

Setup a Defense Perimeter.
The Moving Average (SUPPORT and RESISTANCE) are you key element in this counter attack.
The more time you have in trading,the more chances you are able to manoeuvre.
Beware of Stop-Running violation of support or resistance.