When you have a sell set up,we know that the market is set up to go higher.So we trade from long side,but the TDST level formed by this buy setup on daily charts is not very useful as a support level because it may be 250-300 points away from the current price so not useful for trading.So after completing the sell set up in current nifty ,we know that he market is likely to go up but it will not indicate if today will be a down day or up day and hence not useful for short term intraday trading.
It is my observation that set up 9 gets completed at half mast and final countdown will get completed after market goes up by equal distance.It is just my observation,no such rule.
So real use of sequential is for identifying and trading reversals.
Smart_trade