Is there a case for buying PetroChina?

Petrochina is looking good, having rebounding smartly from its 50-day MA, and oil price continuing its rise.

For:

1. Oil price rising
2. Global stock market recovering
3. Nice chart. 50-day MA acting as a good support.
4. Stochastics rising.

Against:

1. Prices have risen some HK$0.54 (equivalent to S$0.11), decreasing my risk-reward ratio.
2. Parabolic SAR red.

So, what must I do?

Split my investment into 2 parts:

Part A
Buy 4 lots at market @ 9.84


Part B
Buy 4 lots later when price "corrects" a little


Key levels
9.50 (immediate support), 9.20 (recent low), 9.00

10.56 (recent high), 12.20, 19.80 (historical high)