DPO: The instruction can not be used in automatic trading

Anyone of you guys has an idea how to solve the problem? I found the code in the spanish forum. the backtest is unreal I think.

// Definición de los parámetros del código
DEFPARAM CumulateOrders = false
DEFPARAM FLATBEFORE = 080000
DEFPARAM FLATAFTER = 220000
 
// Impide al sistema operar en días precisos de la semana
daysForbiddenEntry = OpenDayOfWeek = 6 OR OpenDayOfWeek = 0
x  = 4
IF BarIndex - TradeIndex = x Then
Sell at Market
endif

IF BarIndex - TradeIndex = x Then
exitshort at Market
endif

// Condiciones para entrada de posiciones largas
indicator1 = CCI[30]//30
c1 = (indicator1 > 0)
indicator2 = DPO[15](close)//15
c2 = (indicator2 < 0)
 
IF (c1 AND c2) AND not daysForbiddenEntry THEN
BUY 1 CONTRACT AT MARKET
ENDIF
 
// Condiciones de salida de posiciones largas
indicator3 = CCI[30]//30
c3 = (indicator3 CROSSES OVER 100)//100
 
IF c3 THEN
SELL AT MARKET
ENDIF
 
// Condiciones de entrada de posiciones cortas
indicator4 = CCI[30]//30
c4 = (indicator4 < 0)
indicator5 = DPO[15](close)//15
c5 = (indicator5 > 0)
 
IF (c4 AND c5) AND not daysForbiddenEntry THEN
SELLSHORT 1 CONTRACT AT MARKET
ENDIF
 
// Condiciones de salida de posiciones cortas
indicator6 = CCI[30]//30
c6 = (indicator6 CROSSES UNDER 150)//180
 
IF c6 THEN
EXITSHORT AT MARKET
ENDIF
 
// Stops y objetivos
SET STOP %LOSS 0.2
SET TARGET %PROFIT 0.2