This should do:

//SCALP Dax - 10S
//adaptation de l'horaire - 15h30 mieux que 09h00
//3 TRADES MAX
 
 
// Définition des paramètres du code
DEFPARAM CumulateOrders = false // Cumul des positions désactivé
 
// Empêche le système de placer des ordres pour entrer sur le marché ou augmenter la taille d'une position avant l'heure spécifiée
noEntryBeforeTime = 153000
timeEnterBefore = time >= noEntryBeforeTime
 
// Empêche le système de placer des ordres pour entrer sur le marché ou augmenter la taille d'une position après l'heure spécifiée
noEntryAfterTime = 232500
timeEnterAfter = time < noEntryAfterTime
 
// Empêche le système de placer de nouveaux ordres sur les jours de la semaine spécifiés
daysForbiddenEntry = OpenDayOfWeek = 6 OR OpenDayOfWeek = 0
 
// Conditions pour ouvrir une position en vente à découvert
c1 = (close > close[10])
indicator1 = SenkouSpanB[9,26,52]
c2 = (close > indicator1)
indicator2 = SenkouSpanA[9,26,52]
c3 = (close > indicator2)
 
IF (c1 AND c2) AND timeEnterBefore AND timeEnterAfter AND not daysForbiddenEntry and tally < maxTrades THEN
sellshort 2 CONTRACT AT MArket
partial=0
endif
// sortie partielle
//if shortonmarket and close-tradeprice>=8*pointsize and partial=0 then
if shortonmarket and tradeprice-close>=8*pointsize and partial=0 then
exitshort countofposition/1 contract at market
partial = 1
endif


// Conditions pour ouvrir une position LONG
c4 = (close < close[10])
indicator1 = SenkouSpanB[9,26,52]
c5 = (close < indicator1)
indicator2 = SenkouSpanA[9,26,52]
c6 = (close < indicator2)
 
IF (c4 AND c6) AND timeEnterBefore AND timeEnterAfter AND not daysForbiddenEntry and tally < maxTrades THEN
buy 2 CONTRACT AT MArket
partial=0
endif
// sortie partielle
if longonmarket and close-tradeprice>=8*pointsize and partial=0 then
sell countofposition/1 contract at market
partial = 1
endif

//---------------------------------------------------------------------------------------------------------------
once maxTrades = 3                               //maxNumberDailyTrades
once tally = 0
if intradayBarIndex = 0 then
tally = 0
endif
 
newTrades =  (onMarket and not onMarket[1]) or ((not onMarket and not onMarket[1]) and (strategyProfit <> strategyProfit[1])) or (longOnMarket and ShortOnMarket[1]) or (longOnMarket[1] and shortOnMarket) or ((tradeIndex(1) = tradeIndex(2)) and (barIndex = tradeIndex(1)) and (barIndex > 0) and (strategyProfit = strategyProfit[1]))
 
if newTrades then
tally = tally +1
endif
//------------------------------------------------------------------------------------------------------------------------
//---------------------------------------------------------------------------------------------------------------
//Max-Orders per Day
once maxOrdersL = 1  //long
once maxOrdersS = 1  //short
if intradayBarIndex = 0 then //reset orders count
ordersCountL = 0
ordersCountS = 0
endif
 
if longTriggered then //check if an order has opened in the current bar
ordersCountL = ordersCountL + 1
endif
if shortTriggered then //check if an order has opened in the current bar
ordersCountS = ordersCountS + 1
endif
//------------------------------------------------------------------------------------------------------------------------
// Stops et objectifs
set stop %loss .5
set target %profit 1
 
 
IF Not OnMarket THEN
//
// when NOT OnMarket reset values to default values
//
TrailStart    = 2         //30     Start trailing profits from this point
BasePerCent   = 0.000       //20.0%  Profit percentage to keep when setting BerakEven
StepSize      = 1          //10     Pip chunks to increase Percentage
PerCentInc    = 0.000       //10.0%  PerCent increment after each StepSize chunk
BarNumber     = 8          //10     Add further % so that trades don't keep running too long
BarPerCent    = 5       //10%    Add this additional percentage every BarNumber bars
RoundTO       = -0.5        //-0.5   rounds always to Lower integer,   +0.4 rounds always to Higher integer,     0 defaults PRT behaviour
PriceDistance = 9 * pipsize //7      minimun distance from current price
y1            = 0           //reset to 0
y2            = 0           //reset to 0
ProfitPerCent = BasePerCent //reset to desired default value
TradeBar      = BarIndex
ELSIF LongOnMarket AND close > (TradePrice + (y1 * pipsize)) THEN                              //LONG positions
//
// compute the value of the Percentage of profits, if any, to lock in for LONG trades
//
x1 = (close - tradeprice) / pipsize                                     //convert price to pips
IF x1 >= TrailStart THEN                                                //    go ahead only if N+ pips
Diff1         = abs(TrailStart - x1)                                 //difference from current profit and TrailStart
Chunks1       = max(0,round((Diff1 / StepSize) + RoundTO))           //number of STEPSIZE chunks
ProfitPerCent = BasePerCent + (BasePerCent * (Chunks1 * PerCentInc)) //compute new size of ProfitPerCent
// compute number of bars elapsed and add an additionl percentage
// (this percentage is different from PerCentInc, since it's a direct percentage, not a Percentage of BasePerCent)
// (if BasePerCent is 20% and this is 10%, the whole percentage will be 30%, not 22%)
BarCount      = BarIndex - TradeBar
IF BarCount MOD BarNumber = 0 THEN
ProfitPerCent = ProfitPerCent + BarPerCent
ENDIF
//
ProfitPerCent = max(ProfitPerCent[1],min(100,ProfitPerCent))         //make sure ProfitPerCent doess not exceed 100%
y1 = max(x1 * ProfitPerCent, y1)                                     //y1 = % of max profit
ENDIF
ELSIF ShortOnMarket AND close < (TradePrice - (y2 * pipsize)) THEN                             //SHORT positions
//
// compute the value of the Percentage of profits, if any, to lock in for SHORT trades
//
x2 = (tradeprice - close) / pipsize                                     //convert price to pips
IF x2 >= TrailStart THEN                                                //      go ahead only if N+ pips
Diff2         = abs(TrailStart - x2)                                 //difference from current profit and TrailStart
Chunks2       = max(0,round((Diff2 / StepSize) + RoundTO))           //number of STEPSIZE chunks
ProfitPerCent = BasePerCent + (BasePerCent * (Chunks2 * PerCentInc)) //compute new size of ProfitPerCent
// compute number of bars elapsed and add an additionl percentage
// (this percentage is different from PerCentInc, since it's a direct percentage, not a Percentage of BasePerCent)
// (if BasePerCent is 20% and this is 10%, the whole percentage will be 30%, not 22%)
BarCount      = BarIndex - TradeBar
IF BarCount MOD BarNumber = 0 THEN
ProfitPerCent = ProfitPerCent + BarPerCent
ENDIF
//
ProfitPerCent = max(ProfitPerCent[1],min(100,ProfitPerCent))         //make sure ProfitPerCent doess not exceed 100%
y2 = max(x2 * ProfitPerCent, y2)                                     //y2 = % of max profit
ENDIF
ENDIF
IF y1 THEN                                                                 //Place pending STOP order when y1 > 0   (LONG positions)
SellPrice = Tradeprice + (y1 * pipsize)                                 //convert pips to price
//
// check the minimun distance between ExitPrice and current price
//
IF abs(close - SellPrice) > PriceDistance THEN
//
// place either a LIMIT or STOP pending order according to current price positioning
//
IF close >= SellPrice THEN
SELL AT SellPrice STOP
ELSE
SELL AT SellPrice LIMIT
ENDIF
ELSE
//
//sell AT MARKET when EXITPRICE does not meet the broker's minimun distance from current price
//
SELL AT Market
ENDIF
ENDIF
IF y2 THEN                                                                 //Place pending STOP order when y2 > 0   (SHORT positions)
ExitPrice = Tradeprice - (y2 * pipsize)                                 //convert pips to price
//
// check the minimun distance between ExitPrice and current price
//
IF abs(close - ExitPrice) > PriceDistance THEN
//
// place either a LIMIT or STOP pending order according to current price positioning
//
IF close <= ExitPrice THEN
EXITSHORT AT ExitPrice STOP
ELSE
EXITSHORT AT ExitPrice LIMIT
ENDIF
ELSE
//
//ExitShort AT MARKET when EXITPRICE does not meet the broker's minimun distance from current price
//
EXITSHORT AT Market
ENDIF
ENDIF

I also replaced line 32 with line 33, as it seemed incorrect for SHORT trades. In case I am wrong you can easily undo my replacement.