Merge pull request #4009 from mrsegen/patch-4

[Pairlist] Add PerformanceFilter

docs/includes/pairlists.md

@@ -15,6 +15,7 @@ Inactive markets are always removed from the resulting pairlist. Explicitly blac
 * [`StaticPairList`](#static-pair-list) (default, if not configured differently)
 * [`VolumePairList`](#volume-pair-list)
 * [`AgeFilter`](#agefilter)
+* [`PerformanceFilter`](#performancefilter)
 * [`PrecisionFilter`](#precisionfilter)
 * [`PriceFilter`](#pricefilter)
 * [`ShuffleFilter`](#shufflefilter)
@@ -74,6 +75,15 @@ be caught out buying before the pair has finished dropping in price.
 
 This filter allows freqtrade to ignore pairs until they have been listed for at least `min_days_listed` days.
 
+#### PerformanceFilter
+
+Sorts pairs by past trade performance, as follows:
+1. Positive performance.
+2. No closed trades yet.
+3. Negative performance.
+
+Trade count is used as a tie breaker.
+
 #### PrecisionFilter
 
 Filters low-value coins which would not allow setting stoplosses.