Differences aside some believe it is best to reconcile the two methods, regardless of the duration of the investment. Professor Ricardo Almeida uses this strategy when it comes to managing your portfolio. Thebasic principle is: the more information the better security to make their choices. One option is to buy a stockwith reference to the fundamentals of the company. After the graphics can help identify the best time to buy or sell. Technical analysis shows that the investment phase of the cycle is the bag.