In fact, it has been raising slowly and has started declining. This is an indication that those who have got in lower are slowly booking profit. The daily stochastic has signalled a sell.

You need to book your profit, because, the prospects of any further significant gain immediately is not there. On the other hand, after some time, the price can collapse after the main players have sold their stake for the present. Profit booking never hurts, but losing hurts. You can always get back.