this is sample when price going down
Study Case:
Anton balance Bitcoin has 3BTC she bought at the price of 4.3 million current prices whereas Bitcoin is being priced at 4.2 million when Anton forced sell it then Anton will lose 300,000. But Anton realized price Bitcoin will likely fall in the price of 3.9 million because the international market were declining that surely will follow market Indonesia. Then Anton sells 3 Bitcoinnya at the price of 4.2 million, then Anton getting 12.6 million dollars. With the Anton managed to buy at the price of 4 million because of the Bitcoin market moves as Anton estimate then Anton managed to buy 3.15 BTC. It turns out that the next price Bitcoin moves up into 4.2 million back and Anton sold all Bitcoin which he obtained became 13,230,000 or it means a profit of Rp 630,000.
Based on the case study above seen that when an error occurs the purchase before we can take a chance on a sharp fall in the price to add to the advantage in such manner or at least reduce the losses.