Missing README + image for high and low example

MonsieurV · Apr 26, 2018 · 84de6e7 · 84de6e7
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diff --git a/README.md b/README.md
@@ -227,6 +227,19 @@ Straightforward, simple and lightweight peak detection algorithm, with minimum d
 
 No minimum peak height filtering support.
 
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+# How to find both lows and highs?
+
+Most algorithms detect only local _maximas_. You may want to detect both _minimas_ and _maximas_.
+
+One solution is to invert the signal before feeding it to the algorithm for detecting lows, as suggested by [@raoofhujairi](https://github.com/MonsieurV/py-findpeaks/issues/3).
+
+With two runs, you can then get both lows and highs:
+
+![](/images/highs_and_lows_peakutils_indexes.png?raw=true "High and low peaks with PeakUtils Indexes")
+
+See the related [sample code](/tests/lows_and_highs.py) using PeakUtils.
 
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diff --git a/images/highs_and_lows_peakutils_indexes.png b/images/highs_and_lows_peakutils_indexes.png