You can use the statement “ONCE”
Your code is executed at the end of each bar, but “once” is only executed the first time hence “once”

Example from the documentation:

ONCE myfirstlowest = lowest[10](low)
 
IF(low < myfirstlowest OR low < recentlow) THEN
   recentlow = low
ELSE
   recentlow = recentlow
ENDIF
 
RETURN recentlow 

Can you post an example?

Just in case it is difficult for julopax with the blue button lacking :

// Definition of code parameters
DEFPARAM CumulateOrders = False // Cumulating positions deactivated

// Conditions to enter long positions
indicator1 = AdaptiveAverage[20,2,3000](close)
indicator2 = AdaptiveAverage[70,2,3000](close)
c1 = (indicator1 CROSSES OVER indicator2)
indicator3 = Stochastic[100,50](close)
c2 = (indicator3 < 20) 

IF c1 AND c2 THEN 
  BUY 1 CONTRACT AT MARKET 
ENDIF // Conditions to exit long positions 

indicator4 = AdaptiveAverage[20,2,3000](close) 
indicator5 = AdaptiveAverage[70,2,3000](close) 
c3 = (indicator4 CROSSES UNDER indicator5) 

IF c3 THEN 
  SELL AT MARKET 
ENDIF // Conditions to enter short positions 

indicator6 = AdaptiveAverage[20,2,3000](close) 
indicator7 = AdaptiveAverage[70,2,3000](close) 
c4 = (indicator6 CROSSES UNDER indicator7) 
indicator8 = Stochastic[100,50](close) 
c5 = (indicator8 > 80) 

// My problem lies in c2 and c5 where I only need it the stochastic K% line 
// to be under 20 when the “faster, black” adaptive MA crosses over the “slower, 
// red” one. The K% line doesn’t need to be under 20 if the K% line keeps being
// over the D% line, meaning if the K% line crosses under the D% line before 
// the K% line hits the value 80 only then can the system halt buying new 
// contracts. If not then the system can solely rely on the adaptive MA 
// indicators as long as the K% line keeps being over the D% line

IF c4 AND c5 THEN
  SELLSHORT 1 CONTRACT AT MARKET
ENDIF

// Conditions to exit short positions
indicator9 = AdaptiveAverage[20,2,3000](close)
indicator10 = AdaptiveAverage[70,2,3000](close)
c6 = (indicator9 CROSSES OVER indicator10)

IF c6 THEN
  EXITSHORT AT MARKET
ENDIF