Basic way to draw a trend line:

1. Identify the trend: Determine if it's an uptrend, downtrend, or sideways trend.

2. Choose a chart: Use a line chart or candlestick chart.

3. Select points: Identify two or more significant highs (for downtrend) or lows (for uptrend).

4. Draw the line: Connect the points with a straight line.

For an uptrend, connect the lows.

For a downtrend, connect the highs.

Trend lines help identify:

- Support and resistance levels

- Trend direction

- Potential breakouts or reversals

You don’t understand this basics, charting will be tough.

Also,Keep in mind, trend lines are subjective and may vary depending on the timeframe and points chosen.