Calculating the support and resistance over EOD chart helps you alot. It gives you some what bigger picture where the market can go. If your EOD analysis predicts a fall from the resistance level, then you will be going for a short trade in intraday only. As a buy trade will be counter to the trend. And we want to go with the trend. Simmilarly on a EOD chart taking support, you would like to trade the breakouts to the buy side only. We trade with the trend. We cannot use EOD charts support and level so widely over intraday charts, but we can use pivot levels based on previous days OHLC value to find Daily pivot, Various support and resistance levels. You can know in advance where the support and resistance can come over intraday fluctuations.
and regarding the the weak and strong Scrip. There are always chances that weak scrip can gain strength. Tatasteel was weak on Friday, and performed as an outperformer on monday. Same was the case with DLF. But still charts which are weak remain weak. You can look at the charts of BPCL, Hindpetro, Aban, Suzlon. Having a broader picture in mind can help. Yesterday i considered a sell for tatasteel at 472 levels, but as soon as it breked the previous days high, i knew the trend has changed. Also the signal on my EOD chart has changed frm trend continuation to trend reversal. So just keep a little broader view of the market, so that you dont trade counter to the trend. Whenever i trade intraday, i switch between 5 min, hourly and daily chart once in a while to know where trend is on a bigger time frame.
Like vinod mentioned. The stock which has breaked out previous day, can give the trades in intial hours also. All you want is opportunity. Time does not matter. Some times price opens and start to drive in one direction without any downmove. You can hit some good trades. Like in my first example of live trade, Aban breaked in the first five minutes and gave a shoot of 1.15%. After that it remained in continuous downtrend the whole day. If the conditions are meeting with the system then you can enter at any market hours.
And even if this system is used by masses, it is less prone to failure. Cuase it is not fully indicator based system. It is general understanding of price going up only after breaking the ranges. and that always happen. It happened in past, will happen in future. Price goes up or down this way only.