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Search - "tradingview"
PineScript is absolute garbage.
It's TradingView's scripting language. It works, but it's worse than any language I have ever seen for shoddy parsing. Its naming conventions are pretty terrible, too:
transparency? no, "transp"
sum? no, cum. seriously. cum(array) is its "cumulative sum."
There are other terrible names, but the parser is what really pisses me off.
1) If you break up a long line for readability (e.g. a chained ternary), each fragment needs to be indented by more than its parent... but never by a multiple of 4 spaces because then it isn't a fragment anymore, but its own statement.
2) line fragments also cannot end in comments because comments are considered to be separate lines.
3) Lambdas can only be global. They're just fancy function declarations. Someone really liked the "blah(x,y,z) =>" syntax
4) blocks to `if`s must be on separate lines, meaning `if (x) y:=z` is illegal. And no, there are no curly braces, only whitespace.
There are plenty more, but the one that really got me furious is:
98) You cannot call `plot()`, `plotshape()`, etc. if they're indented! So if you're using non-trivial logic to optionally plot things like indicators, fuck you.
Whoever wrote this language and/or parser needs to commit seppuku.15