Hello Traders, Would some of you experienced traders please provide comments on my bid ask strategy that I have compiled using Excel. Let me give you a brief explanation. The strategies goal is to help me determine who the major players are at any given moment by looking at the bid/ask price and bid/ask size for the stocks of the DJIA. The following caption was taken from www.tradetrek.com Bid/ask prices are always posted with corresponding bid and ask sizes, which serve as measures of the strength and depth of the bid/ask prices. They tell us about the supply/demand pressures on a stock at a given moment. We can summarize important Bid/Ask size concerns as follows: A large bid size indicates a strong demand for the stock. A large ask size shows that thereâs a large supply of the stock. If the bid size is significantly larger than the ask size, then the demand for the stock is larger than the supply of the stock; therefore, the stock price is likely to go up. If the ask size is significantly larger than the bid size, then the supply of the stock is larger than the demand for the stock; therefore, the stock price is likely to drop. Because bid/ask prices and sizes change quickly in real-time, supply and demand also change quickly in real-time. Experienced traders always pay very close attention to the bid/ask sizes of a stock to monitor the supply-demand dynamic. Short-term traders usually buy a stock only when the demand is higher and sell a stock if demand suddenly becomes lower relative to supply. With that said I have compiled a spreadsheet which does the following for each stock and makes a tally of the numbers. The formula is as follows: If bid prices for the majority of the stocks of the DJIA are greater than ask price and bid size is greater than ask size and the current prices are greater than previous prices for the majority of the stocks then the underlying sentiment is bullish. For bearish sentiment the formula is as follows: If the ask price for the majority of stocks of the DJIA are greater than the bid price and ask size is greater than the bid size and the current price is less than the previous price then the general sentiment is bearish. The overall aim is to assess the bid/ask prices/sizes of the stocks of the DJIA to trade the mini-dow. So if I see large bidding in for the 30 stocks I will go long YM (mini-dow). But there is one thing I haven't included in the formula which is volume. Can someone please first comment on the strategy, secondly let me know if I should take volume into account (I think not because I'm already looking at bid / ask sizes, but would like you're suggestions. Cheers Carlton P.S. Sorry for the bad grammar.