test.pine

//@version=5
strategy("My Strategy", overlay=true)
source = close

var float[] arr = array.from(1.0, -2.0, 3.0, -4.0, 3.0)

// get new price equal to the old price
var float newPrice = source

// for each next 5 candles, get the new price equal old price plus each element of the array
for i = 0 to 4
    if (i % 2 == 0)
        newPrice := newPrice + array.get(arr, i)
    else 
        newPrice := newPrice - array.get(arr, i)
    
    // if the lower price of the candle next to source is greater than the new price, mark it as a buy signal
    if (ta.lowest(source + i, 1) < newPrice) 
        strategy.entry("Dính giao dịch", strategy.long, stop=source + i, oca_name="This is OCA name", oca_type=strategy.oca.cancel, comment="This is comment")