Rangarajanji,
Long time...Welcome back...Presently patel engg is in good structure for going long 68-70 zone...
Looking at past 1-year, its in sell mode, its below 200 SMA for me...Also it tried to attempt above 50 SMA(intermediate moving avg) but failed many a times...so its a stay away category for me...
Generally if stock is well below 200 SMA, and if there is some momentum oversold in macd like indicators...oversold should be deep one...then the pullback rally goes till 200 SMA..these setups can be played but with caution..as stock in downtrend begets lower levels...
For long. only the retracement in this november towards 200 SMA is good zone to go long...first selling has been below avg, so sign of holding that zone has greater probability...