Pine Script v6 in 2026: math.sum, math.tanh, User Defined Types & Risk Management Engine

//@version=6
indicator("Pine Script v6 Math & Non-Linear Activation", overlay=false)

// Native vector sum across an array of returns
var float[] log_returns = array.new_float(0)
float current_return = math.log(close / close[1])
array.push(log_returns, current_return)
if array.size(log_returns) > 50
    array.shift(log_returns)

// Hyperbolic tangent non-linear activation (useful for signal bounding [-1.0, 1.0])
float normalized_zscore = (close - ta.sma(close, 20)) / ta.stdev(close, 20)
float bounded_signal = math.tanh(normalized_zscore)

plot(bounded_signal, "Tanh Signal", color=color.emerald)
hline(0.8, "Upper Bound", color=color.gray)
hline(-0.8, "Lower Bound", color=color.gray)

//@version=6
indicator("GQ Trade Context Engine", overlay=true)

type TradeRiskContext
    string symbol
    float entryPrice
    float stopLossPrice
    float lotSize
    float riskAmountUSD

// Factory method to calculate ATR-based risk
fn_create_context(float risk_pct, int atr_len, float atr_mult) =>
    float atr_val = ta.atr(atr_len)
    float sl_distance = atr_val * atr_mult
    float sl_price = close - sl_distance
    float risk_dollars = (strategy.equity * risk_pct) / 100.0
    float calculated_lots = risk_dollars / (sl_distance * 10.0) // 10 USD per pip standard

    TradeRiskContext.new(syminfo.ticker, close, sl_price, calculated_lots, risk_dollars)

var TradeRiskContext active_trade = na
if ta.crossover(ta.ema(close, 9), ta.ema(close, 21))
    active_trade := fn_create_context(1.0, 14, 2.5)

//@version=6
strategy("GQ Webhook Strategy - Pine v6", overlay=true, initial_capital=10000)

fn_build_order_json(string action, float size, float sl_price) =>
    '{"action":"' + action + '","symbol":"' + syminfo.ticker + '","lots":' + str.tostring(size) + ',"sl":' + str.tostring(sl_price) + '}'

if ta.crossover(ta.sma(close, 20), ta.sma(close, 50))
    string payload = fn_build_order_json("BUY", 0.50, close - 2.5 * ta.atr(14))
    strategy.entry("Long", strategy.long, alert_message=payload)