Active trader turtle trading modified version

//@version=2
//coded by tmr0
//original idea from «Way of the Turtle: The Secret Methods that Turned Ordinary People into Legendary Traders» (2007) CURTIS FAITH
strategy("Turtles strategy modified", shorttitle = "Turtles", overlay=true, pyramiding=5, default_qty_type= strategy.cash, default_qty_value = 1000)

enter_slow = input(55, minval=1)
exit_slow = input(20, minval=1)
year_from = input(2014, minval=2000)
year_before = input(2015, minval=2000)

slowL = highest(enter_slow)
slowLC = lowest(exit_slow)
//slowS = lowest(enter_slow)
//slowSC = highest(exit_slow)

enterL2 = high > slowL[1]
exitL2 = low <= slowLC[1]
//enterS2 = low < slowS[1]
//exitS2 = high >= slowSC[1]


//bgcolor(exitL1 or exitL2? red: enterL1 or enterL2? navy:white)

strategy.entry("slow L", strategy.long, when = enterL2 and year>=year_from and year<year_before)
//strategy.entry("slow S", strategy.short, when = enterS2 and year==year_defined)
strategy.close("slow L", when = exitL2 and year>=year_from and year <year_before)
//strategy.close("slow S", when = exitS2 and year==year_defined)