I asked DeepSeek for the RSI code. After coding it for a different language, I asked for the correct one and this time the code was this one:

// RSI Indicator in ProRealTime (ProBuilder)

// Input parameters
Length = 14 // RSI period length
Overbought = 70 // Overbought level
Oversold = 30 // Oversold level

// Calculate upward and downward price changes
Up = Max(Close - Close[1], 0)
Down = Max(Close[1] - Close, 0)

// Calculate average upward and downward changes
AvgUp = WILDERAverage[Length](Up)      //AvgUp = Average[Length](Up)
AvgDown = WILDERAverage[Length](Down)  //AvgDown = Average[Length](Down)

// Calculate RSI
myRSI = 100 - (100 / (1 + (AvgUp / AvgDown)))   //RSI = .....

// Plot RSI
RETURN myRSI AS "RSI", Overbought AS "Overbought", Oversold AS "Oversold" //RSI AS "RSI"....

it was almost correct, I had to change AVERAGE into WILDERAVERAGE, then it used the keyword RSI wich is reserved so I modified it into myRsi and it worked correctly.

Maybe when I have some more spare time, I will try to ask for something more complex.

Does it have memory even if you are in another chat? That's very good