Stop drawing trend lines yourself and use the advanced trendlines indicator for Metatrader 4. This indicator draws key support and resistance trend lines on any chart and time frame. It also comes with projected price targets based on the breakout of support or resistance trend lines.
Download link: Click here to download the AdvancedTrendlines.ex4 indicator
Automated Trend Lines Chart Example (AUDJPY H1 )
Platform: Metatrader 4
Indicator type: trend lines + support/resistance