Several indicators are suitable for predicting the direction of a trend in forex trading. Moving averages, such as the Simple Moving Average (SMA) or Exponential Moving Average (EMA), provide a smoothed line that helps identify trend direction. The Moving Average Convergence Divergence (MACD) combines moving averages to generate trend signals. The Relative Strength Index (RSI) measures the strength of a trend and helps identify overbought or oversold conditions. The Average Directional Index (ADX) determines the strength of a trend, with readings above 25 indicating a strong trend. The Parabolic SAR and Bollinger Bands also offer insights into trend direction and volatility. Additionally, trendlines and support/resistance levels can be used alongside these indicators to confirm trend direction. It's important to combine multiple indicators and consider other factors like market conditions, news events, and fundamental analysis for a comprehensive trend analysis.