TradingView - POC 1.1

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Sed

//@version=4
strategy("POC 1.1", overlay=true)

// INPUT

draw_only_input = input(title="Draw only", type=input.bool, defval=false)

sar_acc_input = input(title="Sar - Acceleration", type=input.float, defval=0.02, minval=0.01, maxval=0.1, step=0.01)
sar_color_input = input(title="Sar - Color", type=input.color, defval=color.blue)

bb_period_input = input(title="Bollinger Bands - Period", type=input.integer, defval=20, minval=2, maxval=100, step=1)
bb_st_input = input(title="Bollinger Bands - Standard Deviation", type=input.float, defval=2, minval=0.1, maxval=10, step=0.01)
bb_color_input = input(title="Bollinger Bands -  Color", type=input.color, defval=color.aqua)

ema1_period_input = input(title="Exponential Moving Average 1 - Period", type=input.integer, defval=7, minval=2, maxval=100, step=1)
ema1_color_input = input(title="Exponential Moving Average 1 - Color", type=input.color, defval=color.blue)

ema2_period_input = input(title="Exponential Moving Average 2 - Period", type=input.integer, defval=25, minval=2, maxval=100, step=1)
ema2_color_input = input(title="Exponential Moving Average 2 - Color", type=input.color, defval=color.fuchsia)

ema3_period_input = input(title="Exponential Moving Average 3 - Period", type=input.integer, defval=75, minval=2, maxval=100, step=1)
ema3_color_input = input(title="Exponential Moving Average 3 - Color", type=input.color, defval=color.yellow)

// DATA

sar_data = sar(sar_acc_input, sar_acc_input, .2)
[bb_middle, bb_upper, bb_lower] = bb(close, bb_period_input, bb_st_input)
ema1_data = ema(close, ema1_period_input)
ema2_data = ema(close, ema2_period_input)
ema3_data = ema(close, ema3_period_input)

// COMPUTE

hasEntryLongConditional() => crossover(close, bb_lower) and volume > 0
hasCloseLongConditional() => crossunder(close, bb_upper) and volume > 0


// FUNCTION

hasOpenTrade() => strategy.opentrades != 0
notHasOpenTrade() => strategy.opentrades == 0

// ACT
if (draw_only_input == false)
    if (notHasOpenTrade())
        strategy.entry("LONG", strategy.long, when=hasEntryLongConditional())
    else
        strategy.close("LONG", when=hasCloseLongConditional())
        

// PLOTING

plot(sar_data, style=plot.style_circles, linewidth=1, color=sar_color_input)

bb_upper_plot = plot(bb_upper, color=bb_color_input)
bb_lower_plot = plot(bb_lower, color=bb_color_input)
fill(bb_lower_plot, bb_upper_plot, color=bb_color_input)

plot(ema1_data, color=ema1_color_input)
plot(ema2_data, color=ema2_color_input)
plot(ema3_data, color=ema3_color_input)