Jacobus R. van den Brink’s article, “Overhauling Market Breath,” describes two alternate method of calculating the TRIN. While most of his article focuses on Method 2, both formulas are included below. The TRIN requires broad market data for the number of advancing issues, declining issue, advancing volume, and declining volume. This data and the basic TRIN calculation is installed with all versions of MetaStock since 8.0. The formulas below use the Reuters Datalink version of the broad market data. It is possible to use other sources for the data. You would just need to adjust the path and ticker symbols listed in the security data functions. To enter these indicators into MetaStock: 1. In the Tools menu, select Indicator Builder. 2. Click New to open the Indicator Editor for a new indicator. 3. Type the name of the formula. 4. Click in the larger window and type in the following formula. Name: BRIN (method 1) Formula: ADI:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-A",C); USV:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-A",V); DCI:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-D",C); DSV:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-D",V); trin:=(ADI/DCI)/(USV/DSV); (trin-1)/max(1,trin) 5. Click Ok to close the Indicator Editor. 6. Repeat steps 2-5 for the second indicator. Name: BRIN (method 2) Formula: ADI:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-A",C); USV:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-A",V); DCI:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-D",C); DSV:=Security("C:\\MetaStock Data\\BM Data\\X.NYSE-D",V); trin:=(ADI/DCI)/(USV/DSV); (1-trin)/max(1,trin) William Golson Equis International