Live current exchange chart

Does anyone know of a live currency exchange chart program or website where you can set a target exchange rate and be notified if/when that target is reached within a timeout period?

Maybe it's possible to create something like that ones self.
 
It seems that brokerage houses make customers pay for real-time market updates. How is this different? I suspect that any market data that is in real-time will be fee based.
 
It seems that brokerage houses make customers pay for real-time market updates. How is this different? I suspect that any market data that is in real-time will be fee based.
Maybe there is some program that will provide a snapshot at any point in time where the output could be parsed...
 
This gives me the current rate for GBP/PLN

curl "https://api.nbp.pl/api/exchangerates/rates/A/USD/?format=json" :-

{"table":"A","currency":"funt szterling","code":"GBP","rates":[{"no":"084/A/NBP/2026","effectiveDate":"2026-05-04","mid":4.9229}
 
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