Is this possible using MetaTrader 4?

I’m using MetaTrader4 and I’m wondering if it’s possible to mark the candle or perhaps change the color of the candle when I enter a long/short position. Is there a way to do this?

Not that I know of, but there may be something in an EA to
do it.

The only way I would do it is put a trend line in, like a pointing
stick.

In time you will be able to remember at which point you made
a trade.