You need a strategy in order to properly execute your trades; you must track movements and fluctuations and strategize accordingly. After a long time of testing different strategies, you should be able to arrive at a method that works best for you. If the results are good then your strategy is solid. If the results are bad, then you need to change strategy. A good strategist will watch all relevant trades from start to finish.
If you decide to get into short term trades (scalping), you need to make sure you have done all research that is necessary of you before you begin trading. You should use a method that you developed, and if using someone else’s; make sure you fully understand it, and stay away from complicated software that takes forever learn; there are many easy ones out there that you can learn to use in little or no time.