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

//@version=5
strategy("Sirius Mean Reversion", overlay=true, initial_capital=10000, default_qty_type=strategy.percent_of_equity, default_qty_value=10, commission_type=strategy.commission.percent, commission_value=0.05)

// --- Inputs ---
lengthRSI = input.int(14, title="RSI Length", group="Oscillator")
overbought = input.float(70.0, title="Overbought Level", group="Oscillator")
oversold = input.float(30.0, title="Oversold Level", group="Oscillator")

bbLength = input.int(20, title="Bollinger Band Length", group="Bands")
bbMult = input.float(2.0, title="Bollinger Band Multiplier", group="Bands")

tpPercent = input.float(2.0, title="Take Profit (%)", step=0.1, group="Exit Strategy")
slPercent = input.float(1.0, title="Stop Loss (%)", step=0.1, group="Exit Strategy")

// --- Calculations ---
rsiVal = ta.rsi(close, lengthRSI)
[basis, upper, lower] = ta.bb(close, bbLength, bbMult)

// --- Plotting ---
plot(basis, "BB Basis", color=color.new(color.white, 50))
plot(upper, "BB Upper", color=color.new(color.blue, 50))
plot(lower, "BB Lower", color=color.new(color.blue, 50))

// --- Logic ---
longCond = ta.crossunder(close, lower) and rsiVal < oversold
shortCond = ta.crossover(close, upper) and rsiVal > overbought

// --- Execution ---
var float longEntryPrice = na
var float shortEntryPrice = na

if (longCond and strategy.position_size == 0)
    strategy.entry("Long", strategy.long)
    longEntryPrice := close

if (shortCond and strategy.position_size == 0)
    strategy.entry("Short", strategy.short)
    shortEntryPrice := close

// Fixed Percentage Exits
if (strategy.position_size > 0)
    longTp = longEntryPrice * (1 + tpPercent / 100)
    longSl = longEntryPrice * (1 - slPercent / 100)
    strategy.exit("Exit Long", "Long", limit=longTp, stop=longSl)

if (strategy.position_size < 0)
    shortTp = shortEntryPrice * (1 - tpPercent / 100)
    shortSl = shortEntryPrice * (1 + slPercent / 100)
    strategy.exit("Exit Short", "Short", limit=shortTp, stop=shortSl)