Many players had high hopes for the new Chandra planeswalker. While it's pretty god in Mono-Red decks, it won't be even considered for any other archetype.
This, of course, makes her a very unreliable source of investment, and currently everyone is predicting its fall from grace to a $5-7 range.
Since Mono-Red decks don't perform too well in standard these days, it will be mostly carried by commander players. But that's just not enough to guarantee a solid performance on the market.