If you remember 4 thing before entering any new trades:
1) Right Pair
2) Right Price
3) Right Session
4) Right Time
Yes, 4 out 4 is best above- but I will go with 3 out of 4 of above, if other things are supporting a trade.
*Then this will help you int lining up any news trades with high liquidity and , especially if you are day trading or scalping.
Use Forex Pip Calculator and NO you do not have to use standard size lots when trading (100,000 units)- this example is 70,000 units related to risk management and to adjust to 18 pip loss and target of 52 pips. *You can use standard lots, mini lots or micro lots- trading Forex is long game not short game.
Good luck and Good Trading!!!