Trading tip’s Rule #2 - Test and test often –
This goes for the all types of traders, from the smallest to the largest. Once a position is established long or short, it’s best to test and test often. Let’s go with the long position for this example. Looking at the recent move in Facebook, let’s say that Trader one is a short-term day trader who likes to be flat by the end of the day, so he/she buys 500 Facebook shares at $27.75. The stock moves to $28. I would suggest testing the market by selling just 100 shares at $28.

