NK Trend Trigger Factor

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © NKactive
//@version=5

strategy("NK Trend Trigger Factor", overlay=false, initial_capital=1000, default_qty_type=strategy.percent_of_equity, default_qty_value=100, pyramiding=0, slippage=1)
import EliCobra/CobraMetrics/4 as cobra
//// PLOT DATA
disp_ind = input.string ("None" , title = "Display Curve" , tooltip = "Choose which data you would like to display", options=["Strategy", "Equity", "Open Profit", "Gross Profit", "Net Profit", "None"], group = "🐍 𝓒𝓸𝓫𝓻𝓪 𝓜𝓮𝓽𝓻𝓲𝓬𝓼 🐍")
pos_table = input.string("Middle Left", "Table Position", options = ["Top Left", "Middle Left", "Bottom Left", "Top Right", "Middle Right", "Bottom Right", "Top Center", "Bottom Center"], group = "🐍 𝓒𝓸𝓫𝓻𝓪 𝓜𝓮𝓽𝓻𝓲𝓬𝓼 🐍")
type_table = input.string("None", "Table Type", options = ["Full", "Simple", "None"], group = "🐍 𝓒𝓸𝓫𝓻𝓪 𝓜𝓮𝓽𝓻𝓲𝓬𝓼 🐍")
plot(cobra.curve(disp_ind))
cobra.cobraTable(type_table, pos_table)
//
// ****************************************************************************************************************************************************************
//

// Inputs
timeframeTTF=input.timeframe(defval ='1D', group = "Trend Trigger", tooltip = "Select a different timeframe for this series") // Use Alternative timeframe
length=input(30, group="Trend Trigger")
bt = input( 100, title="Buy Trigger", group="Trend Trigger")
st = input( -100, title="Sell Trigger", group="Trend Trigger")
markCrossovers = input.bool(false, title="Mark Cross Overs", group="Trend Trigger", tooltip = "Just to make crossovers pretty")

// Functions
prev(s,i) =>
    y=math.abs(math.round(i))
    s[y]

calc_ttf( periods ) =>
    bp = request.security(syminfo.tickerid,timeframeTTF, ta.highest(high, periods)) - prev( request.security(syminfo.tickerid,timeframeTTF, ta.lowest(low, periods)), - periods)
    sp = prev(request.security(syminfo.tickerid,timeframeTTF,ta.highest( high, periods )), - periods ) - request.security(syminfo.tickerid,timeframeTTF,ta.lowest(low, periods))
    100 * (bp - sp) / ( 0.5*( bp + sp) )

//Calculation
ttf = calc_ttf( length )

// Plot gray chart boundaries bt and bs
plot(0, color=color.gray)
btl=plot(bt, color=color.gray, linewidth = 3)
stl=plot(st, color=color.gray, linewidth = 3)

long_f = request.security(syminfo.tickerid,timeframeTTF,ta.cross( ttf, st )) and request.security(syminfo.tickerid,timeframeTTF,ta.rising(ttf, 1))
short_f = request.security(syminfo.tickerid,timeframeTTF,ta.cross(ttf, bt )) and request.security(syminfo.tickerid,timeframeTTF,ta.falling(ttf, 1))

bs = (ttf > bt) ? bt : ttf
us = (ttf < st) ? st : ttf
bl=plot(bs, color=color.white)
ul=plot(us, color=color.white)
tl=plot(ttf, title="TTF", color=markCrossovers ? (long_f ? color.green : short_f ? color.red : color.blue) : color.maroon, linewidth=2)
fill(bl, tl, color.new(color.green, 75))
fill(ul, tl, color.new(color.red, 75))

// ****************************************************************************************************************************************************************
// Call combine signals and execute buy/sell positions within timeframe
//.****************************************************************************************************************************************************************
// Date Range To Include
startDate = timestamp("2018-01-01T00:00")
endDate = time
// Check if the current timestamp is within the restricted range
inRestrictedRange = time >= startDate and time <= endDate
//
// Buy Signals on overbought and oversold
//
if inRestrictedRange and long_f // ADD OTHER BUY SIGNAL BOOLS
    strategy.entry("My Long Entry Id", strategy.long, 100)
if inRestrictedRange and short_f // ADD OTHER BUY SIGNAL BOOLS
    strategy.entry("My Short Entry Id", strategy.short, 100)