//@version=3
study("Kozlod - Pivot Reversal Strategy Alerts", overlay=true)

// 
// author: Kozlod
// date: 2018-03-11
// 

////////////
// INPUTS //
////////////

leftBars = input(4)
rightBars = input(2)

/////////////
// SIGNALS //
/////////////

swh = pivothigh(leftBars, rightBars)
swl = pivotlow(leftBars,  rightBars)

swh_cond = not na(swh)

hprice = 0.0
hprice := swh_cond ? swh : hprice[1]

le = false
le := swh_cond ? true : (le[1] and high > hprice ? false : le[1])

swl_cond = not na(swl)

lprice = 0.0
lprice := swl_cond ? swl : lprice[1]

se = false
se := swl_cond ? true : (se[1] and low < lprice ? false : se[1])

// Filter out signals if oposite signal is also on
se_filt = se and not le
le_filt = le and not se

// Filter out consecutive signals 
prev = 0
prev := se_filt ? 1 : le_filt ? -1 : prev[1]

se_final = se_filt and prev[1] == -1
le_final = le_filt and prev[1] == 1

// Plot Signals
plotshape(se_final, color = red, text = "se")
plotshape(le_final, color = green, text = "le")

// Create cistom alserts
alertcondition(se_final, "se", "se")
alertcondition(le_final, "le", "le")

Dear Nicolas

Thank you for this work and sorry for the lapsus (this what happens when you are tired…)

May be the administrator can correct the title…