Definition of Support: The price leveo of a particular instrument where there is enough demand should price reach that level to keep prices from falling further.
Definition of Resistance: The price level of a particular instrument where there is not enough demand should price reach that level to keep prices rising further.
Looking on the chart, we should be able to see a pretty good example of support there. You can see that the price has touched that level multiple times, total of 3 times, and then actually bounced of that level. It never returned to touch it and the support level has held.
Similarly, you can see that the price has touched the resistance level 3 times, and third time is usually pretty good confirmation of that. However, price ended up breaking through this resistance level, and continues with the upward trend. So, it is pretty easy to see support and resistance in a range bound market. A trendline is basically a support line, Looking at another chart, we can see that the price touches this uptrend line multiple times, and then continues with the trend.