I believe we all in the #steemit forum should have understood or had a basic knowledge of crytpo Currencies and trading if you are reading this post and it soubds strange I'll advice you to go enroll in the #steemcryptoacademt community where free lessons are being given out to interested Individuals and also are accessed with homeworks .
Now I'll be giving you all some few tips when consideration of trading a new coin
The best way to trade a newly listed coin is to buy it from another exchange and sell at listing time. That will help u hedge all forms of risk. Because two things are likely to occur during a listing : "a PUMP or a DUMP". Usually when a coin is already being traded on other exchanges before getting listed on a new exchange, you should have 90% chance that it will dump, But Incase the supposed exchange is the First to list the coin, then you can expect a pump to occur.
In the case were a dump is to take place, you will still make profit if u were already holding the coin before listing time. Now don't forget this: during a dump, price just fall from a higher value to stabilize with already existing prices found on other exchanges. There is no big arbitrage gap created between two exchanges. This is High Frequency Trading (HFT) method.