Trouble porting MQL4 for loop to Pinescript

External question — Stack Overflow Stack Exchange Author: RRS Original post: https://stackoverflow.com/questions/73071987 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Well, I taught myself MQL4/C++ (enough to get around in it at least) and I'm trying to transfer an indicator I built over to TradingView. I'm having trouble wrapping my head around the syntax differences though. Here's the MQL4 loop for(int i=limit; i>=1; i--) { if(KBuffer[i]>80 || KBuffer[i]<20) CrossoverValue=KBuffer[i]; else if(KBuffer[i]>CrossoverValue) BuyBuffer[i]=100; else if(KBuffer[i]<CrossoverValue) SellBuffer[i]=100; if(KBuffer[i]>CrossoverValue) EntryCondition[i]=1; //1=Buy if(KBuffer[i]<CrossoverValue) EntryCondition[i]=2; //2=Sell } and here's what I've got so far in Pine for i = 1 to 100 if k[i] > 80 or k[i] < 20 crossoverValue = k[i] else if k[i] > crossoverValue buyBuffer[i] = 100 else k[i] < crossoverValue sellBuffer[i] = 100 if k > crossoverValue entryCondition := 1 if k< crossoverValue entryCondition := -1 I know I'm not getting the Pine syntax right, but after doing a bunch of googling and reading the Pine manual I'm still struggling. Currently I'm getting a Mismatched input 'if' expecting 'end of line without line continuation'. error. Any pointers as to where I'm going wrong would be really appreciated! For reference, here's a screenshot of the MT4 version. It's delivering a buy signal when the Stochastic K line has crossed above 20 and is below 80, and vice versa.

External answer — Stack Overflow Stack Exchange Author: Dave Original post: https://stackoverflow.com/a/73075772 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. You're almost there Documentation: https://www.tradingview.com/pine-script-reference/v5/#op_for for i = limit to 0 by -1 if k[i] > 80 or k[i] < 20 crossoverValue = k[i] else if k[i] > crossoverValue buyBuffer[i] = 100 else k[i] < crossoverValue sellBuffer[i] = 100 if k > crossoverValue entryCondition := 1 if k< crossoverValue entryCondition := -1 "For reference, here's a screenshot of the MT4 version. It's delivering a buy signal when the Stochastic K line has crossed above 20 and is below 80, and vice versa." Maybe use the standard stochastic indicator then? //@version=5 indicator(title="Stochastic", shorttitle="Stoch", format=format.price, precision=2, timeframe="", timeframe_gaps=true) periodK = input.int(14, title="%K Length", minval=1) smoothK = input.int(1, title="%K Smoothing", minval=1) periodD = input.int(3, title="%D Smoothing", minval=1) k = ta.sma(ta.stoch(close, high, low, periodK), smoothK) d = ta.sma(k, periodD) buy = ta.crossover(k, 20) sell = ta.crossunder(k, 80) plot(k, title="%K", color=#2962FF) plot(d, title="%D", color=#FF6D00) plotshape(buy, title = "Buy", shape = shape.triangleup, location = location.belowbar, size = size.normal, color = color.green) plotshape(sell, title = "Sell", shape = shape.triangledown, location = location.abovebar, size = size.normal, color = color.red) h0 = hline(80, "Upper Band", color=#787B86) hline(50, "Middle Band", color=color.new(#787B86, 50)) h1 = hline(20, "Lower Band", color=#787B86) fill(h0, h1, color=color.rgb(33, 150, 243, 90), title="Background")

External answer — Stack Overflow Stack Exchange Author: RRS Original post: https://stackoverflow.com/a/73085603 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Here's what I ended up with – the 'or' operator in the first if statement wasn't working for some reason, so I had to split it up, and a number of other syntactical things. var float crossoverValue = 0 for i = 0 to 0 if k[i] > 80 crossoverValue := k[i] else if k[i] < 20 crossoverValue := k[i] entryCondition = if k > crossoverValue color.green else if k < crossoverValue color.red else #9598a1 Note: the code editor is massacring my line breaks when I try to paste it into the basic 'curly brackets' type. I have to use the JS/HTML/CSS block for some reason.

External answer — Stack Overflow Stack Exchange Author: RRS Original post: https://stackoverflow.com/a/73085921 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Oh. Turns out I don't need a for loop at all! 🤣 I'm so used to using them in MT4. Here's the actual final result. var float crossoverValue = 0 if k > 80 crossoverValue := k else if k < 20 crossoverValue := k entryCondition = if k > crossoverValue color.green else if k < crossoverValue color.red else #9598a1