MTF trend alignment

//@version=5
// Multi-timeframe EMA alignment — fires only when 3 timeframes agree.
// Long: current TF EMA > higher TF EMA > even higher TF EMA (uptrend confluence).
// Short: inverse alignment.
// Lower trade frequency, higher win rate. Default tuned for crypto on 1h
// chart with 4h + 1D confluence.
//
// Schema target: TVAlert (services/tradingview-bridge/src/tradingview_bridge/schemas.py)

strategy(
     title="bridge/05 - MTF trend alignment",
     shorttitle="05-MTF",
     overlay=true,
     default_qty_type=strategy.percent_of_equity,
     default_qty_value=15,
     initial_capital=10000,
     commission_type=strategy.commission.percent,
     commission_value=0.10)

// === Inputs ===
ema_length = input.int(50, "EMA length",        minval=2)
htf_1      = input.timeframe("240", "Higher TF 1", tooltip="Default 240 = 4h")
htf_2      = input.timeframe("D",   "Higher TF 2", tooltip="Default D = daily")

ASSET_CLASS   = input.string("crypto", "Asset class",
     options=["stock", "etf", "bond", "fx", "crypto", "prediction"])
STRATEGY_NAME = input.string("mtf-trend-alignment", "Strategy name (for journal)")
SECRET        = input.string("REPLACE_WITH_YOUR_TVBRIDGE_TV_WEBHOOK_SECRET", "Webhook shared secret")

// === EMAs across 3 timeframes ===
ema_ltf = ta.ema(close, ema_length)
ema_h1  = request.security(syminfo.tickerid, htf_1, ta.ema(close, ema_length), lookahead=barmerge.lookahead_off)
ema_h2  = request.security(syminfo.tickerid, htf_2, ta.ema(close, ema_length), lookahead=barmerge.lookahead_off)

plot(ema_ltf, "EMA (chart)", color=color.new(color.blue,   0))
plot(ema_h1,  "EMA (HTF1)",  color=color.new(color.orange, 30))
plot(ema_h2,  "EMA (HTF2)",  color=color.new(color.red,    50))

// === Alignment ===
bullish_align = ema_ltf > ema_h1 and ema_h1 > ema_h2 and close > ema_ltf
bearish_align = ema_ltf < ema_h1 and ema_h1 < ema_h2 and close < ema_ltf

bgcolor(bullish_align ? color.new(color.green, 92) : bearish_align ? color.new(color.red, 92) : na)

// Trigger on transition into aligned state (avoids re-firing each bar)
long_signal  = bullish_align and not bullish_align[1]
short_signal = bearish_align and not bearish_align[1]

// === Alert message ===
build_alert(action) =>
    '{' +
      '"alert_id":"' + STRATEGY_NAME + '-' + str.tostring(time, "yyyyMMdd-HHmm") + '-' + action + '",' +
      '"secret":"'        + SECRET        + '",' +
      '"strategy_name":"' + STRATEGY_NAME + '",' +
      '"asset_class":"'   + ASSET_CLASS   + '",' +
      '"symbol":"{{ticker}}",' +
      '"action":"'        + action        + '",' +
      '"size":"{{strategy.position_size}}",' +
      '"size_type":"units",' +
      '"price_hint":"{{close}}",' +
      '"order_type":"market",' +
      '"time":"{{time}}",' +
      '"metadata":{"htf1":"' + htf_1 + '","htf2":"' + htf_2 + '"}' +
    '}'

if long_signal
    strategy.entry("L", strategy.long,  alert_message=build_alert("buy"))
if short_signal
    strategy.entry("S", strategy.short, alert_message=build_alert("sell"))