Before buying stocks based on technical analysis, consider checking the following factors:

1. Price Trends: Analyze the stock's price trends over different timeframes (e.g., short-term, medium-term, long-term) using tools like moving averages, trendlines, and chart patterns to identify potential buy signals.

2. Volume: Look at trading volume patterns to confirm the strength of price movements. Higher volume during price increases can indicate strong buying interest, while higher volume during price declines may signal selling pressure.

3. Support and Resistance Levels: Identify key support levels (where buying interest may increase) and resistance levels (where selling pressure may intensify) on the stock's price chart. Breakouts above resistance or bounces off support can be considered buying opportunities.

4. Momentum Indicators: Use momentum indicators such as the Relative Strength Index (RSI), Moving Average Convergence Divergence (MACD), and Stochastic Oscillator to assess the speed and magnitude of price changes. Overbought or oversold conditions can signal potential reversals.

5. Volatility: Consider the stock's volatility, measured by indicators like the Average True Range (ATR) or Bollinger Bands, to gauge potential price fluctuations. Higher volatility may present both opportunities and risks for traders.

6. Chart Patterns: Identify common chart patterns such as flags, pennants, triangles, and head and shoulders formations, which can provide insights into future price movements based on historical price behavior.

7. Candlestick Patterns: Look for candlestick patterns like bullish/bearish engulfing patterns, hammer, doji, and shooting star patterns to assess investor sentiment and potential trend reversals.

8. Confirmation Signals: Seek confirmation signals from multiple technical indicators or patterns to increase the reliability of your trading decisions. For example, a bullish price breakout accompanied by increasing volume and bullish MACD crossover may strengthen the buy signal.

9. Timeframes: Consider different timeframes (e.g., daily, weekly, intraday) to gain a comprehensive view of the stock's price action and trends. Short-term traders may focus on intraday or daily charts, while long-term investors may prioritize weekly or monthly charts.

10. Risk Management: Implement risk management strategies such as setting stop-loss orders, position sizing, and diversification to protect your capital and minimize losses in case the trade doesn't go as planned.

By analyzing these technical factors, traders and investors can make more informed decisions about when to buy stocks based on price movements and market dynamics.