Buying at the high or close of a candle?

Daytrading, if a signal candle closed is it best to buy in at the high or close of the signal candle if going long? Using 5m candles.

for a 5 minute timeframe there is a lot of noise so the validity of a closing candle is not as important as the same thing at a higher timeframe,
Im not to say it is not important, it is important, but not at the same degree as if a candle would close on the higher timeframes, anyhow you should wait until the candle closes or completes otherwice there is no way to get information from the candle, is it a hammer? or a hanging man? you won't know until it's completed, in that sence it's best to wait so you get more information and thereby a better entry and probably a better trade, this goes for any timeframe, Im sure that some people just jump in, but I like to wait.
I suggest you learn how to read candlesticks to further strengten your entrys,
try to pic up a book by Steve Nison, he is the inventor of candle sticks,
a lot of good information there

dont so much look at the candle but the price level and the formation of candles around the level.

a candle is just open,high,low,close of a particular asset at the particular price, they are helpful but it is even better to understand the general direction.