//@version=5
strategy("7PM FVG Trading Strategy", 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
i_session      = input.session("1900-2345:23456", "Trading Session (7PM-12AM IST)", tooltip="Session timeframe and active days (Mon-Fri)")
i_timezone     = input.string("Asia/Kolkata", "Session Timezone")
i_rr           = input.float(2.0, "Risk to Reward Ratio", minval=0.5, step=0.5)

// Time Filter
in_session = !na(time(timeframe.period, i_session, i_timezone))

// FVG Detection (3-Bar Pattern)
// Bullish FVG: Low of current bar > High of 2 bars ago
bull_fvg = (low[0] > high[2]) and (close[1] > open[1])
// Bearish FVG: High of current bar < Low of 2 bars ago
bear_fvg = (high[0] < low[2]) and (close[1] < open[1])

var float fvg_top = na
var float fvg_bot = na
var int fvg_type = 0 // +1 for Bullish, -1 for Bearish
var bool fvg_valid = false

// Reset active state when outside session
if not in_session
    fvg_valid := false
    fvg_type := 0

// Capture FVG formed within session
if in_session and not fvg_valid
    if bull_fvg
        fvg_top := low[0]
        fvg_bot := high[2]
        fvg_type := 1
        fvg_valid := true
    else if bear_fvg
        fvg_top := low[2]
        fvg_bot := high[0]
        fvg_type := -1
        fvg_valid := true

// Entry Execution on Gap Retest
if in_session and fvg_valid and strategy.position_size == 0
    if fvg_type == 1 and low <= fvg_top and close >= fvg_bot
        entry_price = close
        sl = fvg_bot
        risk = entry_price - sl
        if risk > 0
            tp = entry_price + (risk * i_rr)
            strategy.entry("Long FVG", strategy.long)
            strategy.exit("Exit Long", "Long FVG", stop=sl, limit=tp)
            fvg_valid := false
    else if fvg_type == -1 and high >= fvg_bot and close <= fvg_top
        entry_price = close
        sl = fvg_top
        risk = sl - entry_price
        if risk > 0
            tp = entry_price - (risk * i_rr)
            strategy.entry("Short FVG", strategy.short)
            strategy.exit("Exit Short", "Short FVG", stop=sl, limit=tp)
            fvg_valid := false

// Visualizations
plot(fvg_valid and fvg_type == 1 ? fvg_top : na, "Bull FVG Top", color=color.green)
plot(fvg_valid and fvg_type == 1 ? fvg_bot : na, "Bull FVG Bottom", color=color.lime)
plot(fvg_valid and fvg_type == -1 ? fvg_top : na, "Bear FVG Top", color=color.red)
plot(fvg_valid and fvg_type == -1 ? fvg_bot : na, "Bear FVG Bottom", color=color.orange)