TATA MOTORS RETRACEMENT CALCULATION FROM TRENDLINE RESISTANCE

I HAVE SHOWN MOVES TO AND FRO FROM TREND LINE WHICH IS VERY GOOD RESISTANCE AND REVERSAL POINT NOW AS WE CAN SEE IN 1ST PAIR STOCK FELL 26,75 THEN BACK UP 17.90 RUPEES DIFFERENCE IS 8.85 THEN MOVE TO 2ND PAIR DIFFERENCE IS 7.4 RUPEES TO AVERAGE THESE BOTH DIFFERENCES LETS TAKE ROUGH VALUE 8 NOW LETS ADD THIS VALUE TO LAST 4TH PAIR WHICH CURRENTLY ACTIVE AND STOCK HAS ALREADY COMPLETED UP MOVE NOW HOW TO CALCULATE DOWN SIDE FIRST FALL WAS 26.75 THEN 33 NOW? APPROX WE CAN SEE 6RUPEES PLUS ON DOWNSIDE NOW ADD 6 IN PREVIOUS LOW 33 IT COMES ROUGHLY 39 RUPEES NOW AS SHOWN IN CHART CURRENT ACTIVE FALL STOCK HAS ALREADY FELL 10 RUPEES APPROX NOW FALL REMAINS IS 39 -10 29 RUPEES GOD LUCK
I MAY BE WRONG TRADE AT YOUR OWN RISK GOOD LUCK