This is a market cipher made by VuManChu (Market Cipher A). For the first time in BTC history it has displayed a yellow X. Which indicates market manipulation. Could indicate a Pump or a Dump. More of a suggestion to be wary.
Loads of videos on youtube to learn how to use this indicator. Similar indicators that are not all too different are sold for big $. So big thanks to VuManChu for making it accessible for free.