L&T - Weekly Price chart - Is this a valid Head & Shoulder?

If one connects price movement since April to now then one may be able to visualize Head & Shoulder chart pattern. However price has gone sideways for 4 to 5 weeks at head formation. Is this then the valid Head & Shoulder. Theoretically, the expected price decline is up to height from head to neckline. However, this improbable in case of L&T. What can be a fair estimate of likely fall on the breakout? if this is valid H&S.