Horizontal Lines

Hi,

I need a tool that will automaticaly update the horizontal lines i draw on chart. For example I draw a line to 17.04.2017, 15:21 candle Open and Close Price. I need tool to update this line everyday at 15:21 open and close price.

I mean when another days comes tool will move the line exactly ar 15:21 of the same day. it will move the line, not draw another one.

Also i need a tool to calculate the price on similar currencies. like if eur/usd= 1234, eur/jpy=4321, usd/jpy=?

regards