~ The idea is that you buy low and sell high, repeating the process over and over again to profit. ~
actually this is what people say when they are too lazy to go into details.
the idea is to buy low when you know price is going high and then sell when you know price won't go any higher.
you can't just put orders and think they MUST be filled.
for instance in Ripple and Ethereum the pumps are over so there is no low anymore. all prices are high and a time for sell. yeah it may bounce back sometimes but the general flow right now is dump-dump-dump.
and for litecoin, nothing is clear at the moment and it is best to stay away.
and remember this is altcoin market we are talking about, it is full of manipulation. the margin trading works in a more logical market not where there is pump and dumps going on.
Buy low, sell high is simplified but it's still correct. Buy low doesn't mean buy at any time and wait for it to go up - the phrase clearly means to buy at the bottom and
then wait for it to rise. All you have to do is find a more predictable coin that goes up and down regularly and doesn't completely collapse when it goes down or get too mental a pump when it goes up. There are several coins like that.
There's also buying low and selling high when a coin has potential (it's a good idea and could have its price rise a lot from demand, or could just be pumped), but that's unrelated to bot trading because bots are mostly based on buying and selling stable coins based on minor variations during the day.