You do not have to worry because the big red candle will change and will replace by the big green candle. These situations are normal after bitcoin price touch the new ATH for temporary, and the price now is making a correction, and then the price will start another rally to the high price. You can place your order buy at that price, but don't use all-in to buy the bitcoin, and try to make more than 1 order buy, so if the price is going down for more, you will have a chance to buy more bitcoin at a low price.