I know this one has been asked many times before and I think I get it, but I just need a little more clarification.
At the moment, https://ethgasstation.info shows the following gas prices
Safe Low 1 gwei Standard 5 gwei Fast 8 gwei
So, I get that those are the recommended gas prices depending on how fast I want my transaction to be processed.
My question is regarding the gas limit. On this post, Questions about some details on Ethereum transfers and Gwei it mentions that a simple transfer will always be 21,000 gas but then later says gas limit is 21,000 + additional gas needed by the contract.
All I want to do is move some ETH from my wallet to an exchange, so does a simple transfer need any additional gas or is the original statement that 21,000 is enough true?
Am I right in thinking that if I use a limit of 21,000 at a price of 1 gwei to move ETH from my wallet to an exchange, it should go through in around 30 minutes?
The thing that concerns me about the limit is, if I don't specify enough, the transaction won't complete and I'll just lose the gas I've paid.
Thanks for any advice you can give.