Lot size.read this post #922
Your larger leverage will not make any difference as to the copying ratio.
Your smaller leverage decreased the copying ratio, but the larger doesn't increase it.
They stay open and unattended.
Q1: When optimizing the MT4 platform on a VPS for minimum resource draw, what are the minimum elements necessary for a strategy 1) that only trades one symbol (i.e., EURUSD) and 2) that trades multiple symbols?
Q2: Must all symbols to be traded in a strategy appear somewhere on the MT4 workspace in order to trade a symbol? For example, a copy signal trades many symbols. Must all possible symbols to be traded by the copy signal be located on the watchlist, or a chart?
1. A simple chart with no extra unnecessary custom indicators and your EA attached and setup (multiple charts for multiple currencies).
2. If your question is about copying a signal, you don't need any open chart of any currency pair, you only need to have the traded pairs enabled in MT4/5 >> View >> Symbols.
You can only try and see if it works.