you need to come up with a trading system, one that is mechanical, and reduces emotion involved, and learn money management.
in a nutshell, here is an example of a system i use, (chart below)
i like to key off classic patterns. heres an example of some recent trading opportunities on a nasdaq 100 bar chart. notice the 5 reversal patterns? i like trading the pattern breakouts.
remember patterns are not confirmed until they breakout. also notice the moving averages crossed over near the pattern breakouts by the vertical lines. when those two moving averages come together(i use a 20 and 40ma), they indicate a reversal or continuation pattern may be forming. the two indicators on the bottom are breadth indicators, the mcclellan ocsillator, and the Percent of Stocks Above 50 Day Moving Average. breadth weakness or strength helps confirm a patterns validity, and overall market internal strength.
when a trade-able pattern forms, as soon as price breaks above support(or resistance) decisively a limit order is placed, along with a stop order just below support, in case the breakout fails. a limit order may also be placed at the desired price target area. or some type of a trailing stop may be used.
i daytrade, so i'll have several trading opportunities each week. same principle just different time frames.
open a paper trading account and practice while you are in school.
be advised a large percentage of traders fail.
here's some info to get you going,
lots of good and free info on this site. i subscribe for about $11/month.
http://stockcharts.com/articles/
http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:chart_patterns
here's a couple good books i favor,
http://www.amazon.com/Encyclopedia-Chart-Patterns-Thomas-Bulkowski/dp/0471668265
http://www.amazon.com/Technical-Ana...F8&qid=1462910704&sr=1-1&keywords=john+murphy
and money management
http://www.swing-trade-stocks.com/money-management.html
cheers