If the price is really not going anywhere, then the lines that you draw thru the highest highs and the lowest lows will either be horizontal and parallel to each other, or they will be converging (drawing closer together) or diverging (drawing apart). If they are horizontal, you might use them as support and resistance lines in the same way. Wait for a trend to form.
If the lines are converging, they can indicate a breakout. In this example you shouldn’t treat the lines as support and resistance lines but wait for the price to go past any one of them and continue that way. So if the price breaks above the upper line you would buy, expecting it to resume in that way for a while. Like all currency exchange systems, these aren’t warranted. Always test your system in a demo account before going live. These steps will help you to develop a successful foreign exchange trading strategy..