After 9 months of consecutive decrease, the EUR / USD pair is showing a cautious bullish move.
I differentiate the key levels in two ways:
Technical: Realised highs and lows - suitable for shorter term trigger points for entry / exit areas
Psychological: Rounds number levels (regardless whether the pair has tested/reach them - potentially significant and suitable for longer term entry / exit areas
The Quarterly review aims to get the big picture of the pair's movement, before jumping in the Monthly & Weekly review, which focus on timing and trading.