What will happen on your altcoins in exchanges during hardfork?

[bitcoinvestor]

Is it okay to leave your coins in exchanges during the fork OR to transfer it on your wallet?

What hardfork do you mean? ETH or bitcoin. Bitcoin hardfork will be in the near time. Many suggestions say that we should hold the coin in the wallet that we own the private key. If not we will lost our BTC. Some exchangers that are supporter of btc gold will decline withdrawal of bitcoin. I think you should withdraw the bitcoin from those exchangers and wallets.

[ethereumhunter]

Is it okay to leave your coins in exchanges during the fork OR to transfer it on your wallet?

i think its fine to leave our coins in exchanges as long as we can keep secure our account with 2fa and only us that can accessed. but i think if you can transfer it on your wallet then it will be safety because only you that will know the amount and only you that can manage your own coins. i leave my bitcoin in poloniex, bittrex and other exchanges until now and i am not too worried about the fork and i think it will be safe in that site.