[RichG] Easy MTF Strategy

//@version=2
strategy("[RichG] Easy MTF Strategy", overlay=false)

TF_1_time = input("D", "Timeframe 1")
TF_2_time = input("5D", "Timeframe 2")
TF_3_time = input("15D", "Timeframe 3")
TF_4_time = input("45D", "Timeframe 4")

transaction_size = input(1, "Contract/Share Amount")

src = close, len = 20
out = sma(src, len)
width = 5
upcolor = green
downcolor = red
neutralcolor = blue
linestyle = line

TF_1 = security(tickerid, TF_1_time, open) < security(tickerid, TF_1_time, close) ? true:false
TF_1_color = TF_1 ? upcolor:downcolor

TF_2 = security(tickerid, TF_2_time, open) < security(tickerid, TF_2_time, close) ? true:false
TF_2_color = TF_2 ? upcolor:downcolor

TF_3 = security(tickerid, TF_3_time, open) < security(tickerid, TF_3_time, close) ? true:false
TF_3_color = TF_3 ? upcolor:downcolor


TF_4 = security(tickerid, TF_4_time, open) < security(tickerid, TF_4_time, close) ? true:false
TF_4_color = TF_4 ? upcolor:downcolor

TF_global = TF_1 and TF_2 and TF_3 and TF_4 
TF_global_bear = TF_1 == false and TF_2 == false and TF_3 == false and TF_4 == false
TF_global_color = TF_global ? green : TF_global_bear ? red : white
TF_trigger_width = TF_global ? 6 : width

plot(1, style=linestyle, linewidth=width, color=TF_1_color)
plot(5, style=linestyle, linewidth=width, color=TF_2_color)
plot(10, style=linestyle, linewidth=width, color=TF_3_color)
plot(15, style=linestyle, linewidth=width, color=TF_4_color)
plot(25, style=linestyle, linewidth=4, color=TF_global_color)    

exitCondition_Long = TF_global_bear
exitCondition_Short = TF_global

longCondition = TF_global
if (longCondition)
    strategy.entry("MTF_Long", strategy.long, qty=transaction_size, when=strategy.position_size == 0)

shortCondition = TF_global_bear
if (shortCondition)
    strategy.entry("MTF_Short", strategy.short, qty=transaction_size, when=strategy.position_size == 0)
    
strategy.close("MTF_Long", when=exitCondition_Long)    
strategy.close("MTF_Short", when=exitCondition_Short)