What do you use for charts?

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Having an eye on your portofolio and watchlists is great, of course, but sometimes you also want to have a look at some stocks charts, so what do you do then, where do you go? Would be grateful for some advice :)

Of course, ticker's README mentions tickrs but (due to Yahoo limitations?) it seems to have a problem with showing charts during before hours (the pre-market state). Thus, as already said, would be really grateful if you guys could share your experience :)