Z-Score-with-Signals

/*backtest
start: 2022-02-07 00:00:00
end: 2022-05-07 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

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

//@version=5

indicator("Z Score with Signals", max_labels_count = 500)

// Calculating High Z Score

a = ta.sma(high, 500)
b = ta.stdev(high, 500)
c = (high - a) / b 

// Calculating Low Z Score

d = ta.sma(low, 500)
e = ta.stdev(low, 500)
f = (low - d) / e 

// Calculating High and Low Average

z = (c + f) / 2 
 
plot (z)

// Condition Alerts

if (z < -2.50)
    strategy.entry("Enter Long", strategy.long)
else if (z > 2.50)
    strategy.entry("Enter Short", strategy.short)