Day's vwap with SD lines
here the SD lines start afresh at the beginning of day. So we need to give it some time like say to half an hour + like say to 9.45-10 atleast to use this for bias
some of the terms are borrowed from Market profile
so using the previous day vwap as POC (point of control) and previous day -1SD to +1SD (at close) as the Value Area. VAH Value area high and VAL value are low. Basically what we are saying is that approximately 70% of the trading previous day happened in thsi area, so if today also trading in this area then there is no new information that is pushing the market in any one direction.
Above VAH there is long bias and below VAL there is short bias
then today's price action that is today's Vwap+SD says what the market is doing with the new information. Above +1SD there is a strong up trend and below -1SD there is a strong down trend. If above VAH then between -1SD and +1SD there is a bull bias and if below VAL then between -1SD and +1SD there is a bear bias