There are many different trend trading strategies, each using a variety of indicators and price action methods. For all strategies, a stop loss should be used to manage risk. For an uptrend, a stop loss is placed below a swing low that occurred prior to entry, or below another support level. For a downtrend and a short position, a stop loss is often placed just above a prior swing high or above another resistance level.
Oftentimes, traders use a combination of these strategies when looking for trend trading opportunities. A trader might look for a breakout through a resistance level to indicate a move higher may be starting, but only enter into a trade if the price is trading above a specific moving average.