# indie:lang_version = 5
# Original indicator “TonyUX EMA Scalper – Buy / Sell”
# Author: tux
# Published on TradingView
# Adapted and rewritten for TakeProfit Platform.
from indie import indicator, param, source, plot, color
from indie.algorithms import Ema, Highest, Lowest
from indie.math import cross

@indicator("TonyUX EMA Scalper – Buy / Sell (Indie Port)", overlay_main_pane=True)
@param.int('length', default=20, min=1, title='Length')
@param.source('src', default=source.CLOSE, title='Source')
@plot.line(title='EMA', color=color.BLUE)
@plot.line(title='Recent High', color=color.RED, line_width=2)
@plot.line(title='Recent Low', color=color.GREEN, line_width=2)
@plot.marker(title='Sell', color=color.RED, style=plot.marker_style.LABEL, position=plot.marker_position.ABOVE)
@plot.marker(title='Buy', color=color.GREEN, style=plot.marker_style.LABEL, position=plot.marker_position.BELOW)
def Main(self, length, src):
    ema_out = Ema.new(src, length)
    last8h = Highest.new(self.close, 8)
    lastl8 = Lowest.new(self.close, 8)
    
    is_cross = cross(self.close, ema_out)
    bearish = is_cross and self.close[1] > self.close[0]
    bullish = is_cross and self.close[1] < self.close[0]
    
    sell_marker = plot.Marker(value=self.high[0], color=color.RED, text="Sell") if bearish else plot.Marker(value=float('nan'), color=color.rgba(0,0,0,0))
    buy_marker = plot.Marker(value=self.low[0], color=color.GREEN, text="Buy") if bullish else plot.Marker(value=float('nan'), color=color.rgba(0,0,0,0))
    
    return ema_out[0], last8h[0], lastl8[0], sell_marker, buy_marker