The key to scalping while using short time frames is to identify price changes before the rest of the market has had the chance to act. You should also be willing to accept very low profit margins—gaining less than 1% on a given action will still usually be in your best interest. Because of this, many scalpers may implement tight stop-loss and stop-limit orders over time.  
Define and write down the conditions under which you'll enter a position. "Buy during uptrend" isn't specific enough. Something like this is much more specific and also testable: "Buy when price breaks above the upper trendline of a triangle pattern, where the triangle was preceded by an uptrend (at least one higher swing high and higher swing low before the triangle formed) on the two-minute chart in the first two hours of the trading day."

The Momentum and Reversal trading strategies are the #1 and #2 best trading strategies out there. These two day trading strategies are being used by thousands of our students who have participated in the Warrior Trading Day Trading Courses. In fact, in a survey of 100 of these students, over 80% are now trading profitably thanks to these strategies (click here for survey details) These strategies can be the basis for your $200/day trading plan.
Much research on historical data has proven that, in a market conducive to swing trading, liquid stocks tend to trade above and below a baseline value, which is portrayed on a chart with an EM). In his book, "Come Into My Trading Room: A Complete Guide to Trading" (2002), Dr. Alexander Elder uses his understanding of a stock's behavior above and below the baseline to describe the swing trader's strategy of "buying normalcy and selling mania" or "shorting normalcy and covering depression." Once the swing trader has used the EMA to identify the typical baseline on the stock chart, he or she goes long at the baseline when the stock is heading up and short at the baseline when the stock is on its way down.

Risk management - Rather than looking for one big trade, the way a trend trader might, the scalper looks for hundreds of small profits throughout the day. In this process the scalper might also take hundreds of small losses during the same time period. For this reason a scalper must have very strict risk management never allowing a loss to accumulate.
Successful traders have to move fast, but they don't have to think fast. Why? Because they've developed a trading strategy in advance, along with the discipline to stick to that strategy. It is important to follow your formula closely rather than try to chase profits. Don't let your emotions get the best of you and abandon your strategy. There's a mantra among day traders: "Plan your trade and trade your plan."