He said that if I want to buy any coins, make sure I can see the red in the price and then pick the number 3 or 5 down from the order buy and place my buy price in that place and don't just make one order buy only but spread into 3 order buy.
That will help me to reduce the average buy price to lower, so I don't have to afraid if somehow the price is down deeper because I already have the other buy order in a low price.
Don't try to place an order when the price changes into a green price if I am not sure on where the trend wants to go and only to wait for a while because the price will always get down for a small price and that will be the best time to place the order buy.