1. **Technical Analysis Signals**: Positive technical indicators, such as bullish patterns on charts (e.g., ascending triangles, cup and handle formations) and strong support levels, can signal potential price increases.

2. **Volume Indicators**: Increasing trading volumes typically indicate growing interest and momentum, suggesting that a bullish trend may continue.

3. **Market Sentiment Analysis**: Sentiment analysis tools showing positive social media and news sentiment can indicate growing trader optimism towards certain altcoins.

4. **Whale Accumulation**: Observing large holders (whales) accumulating altcoins can be a bullish signal, as it indicates confidence in future price appreciation.

5. **Breakout from Key Resistance Levels**: When an altcoin breaks through significant resistance levels, it often leads to a surge in price due to renewed buying interest.

6. **Crossing Moving Averages**: When shorter-term moving averages (like the 50-day MA) cross above longer-term moving averages (like the 200-day MA), it forms a "golden cross," which is a bullish indicator.

7. **Positive Market Correlation**: If leading cryptocurrencies like Bitcoin and Ethereum are in an uptrend, it often lifts altcoins due to positive market correlation.

8. **Strong Relative Strength Index (RSI)**: An RSI between 30-70 indicates that an altcoin is neither overbought nor oversold, suggesting room for upward movement if approaching the upper part of this range.

9. **Favorable Macroeconomic Factors**: Low-interest rates, inflation hedging, and monetary policies can drive more investment into altcoins as traders seek higher returns.

10. **Bullish News and Events**: Announcements of new partnerships, technological upgrades, or listing on major exchanges can drive significant price increases as traders react to the news.

Focusing on these trading-specific indicators and events can help traders identify potential bullish trends in altcoins.