Add parameters to Large Moves strategy documentation

strategies/large-moves/README.md

@@ -16,4 +16,10 @@ As with most of the strategies from this book, they are meant to illustrate cert
 1. When the asset (e.g., SPY) **falls** by 1% or more, enter a long trade.
 2. Exit the trade after 5 trading days (~1 week).
 
+## Parameters
+
+**Percent Gain / Decline Threshold**: The percent gain or decline necessary in order to trigger a trade. (Default: 1.0)
+
+**Days to Exit**: The number of days to wait before exiting a trade. (Default: 5)
+
 ---