Holding period impacts the return of your trades.

UNP price moves up 1% or more for 19% of trading days (or every 5 days).
UNP price moves up 2% or more for 5% of trading days (or every 19 days).
UNP price moves up 3% or more for 2% of trading days (or every 57 days).
UNP price moves up 5% or more for 1% of trading days (or every 172 days).
UNP price moves up 10% or more for 1% of trading days (or every 172 days).