Any ideas how to a good trade
any preferences for instrument and holding period? 
Most people will use technical analysis, TA, i.e. the study of recent price movements on the price chart to select the market, direction and entry timing. Start by picking up everything you can about charts, there is enough free info to fill an entire library.
What kind of trader are you? This might get you headed in the right direction. One of many possible routes to take.