Bruce responded to a prior post about creating a True Strength Index (TSI) with Weighted Moving Averages (WMA) at http://forums.worden.com/default.aspx?g=posts&t=57323

Could you indicate how to change the parameters for (any) different lengths of WMA in a TSI?

More specifically, the TSI formula to create a PCF and chart plot is: 

TSI = WMA(WMA(NetChange,Long),Short) / WMA(WMA(AbsNetChange(n),Long),Short)

Where:  WMA = (front) Weighted Moving Average

The periods I want to evaluate are:  Long = Long Period = 63 bars, and Short = Short Period = 21 bars

NetChange = Typical Price - Typical Price 1 bar ago = (H+L+C)/3 - (H1+L1+C1)/3

AbsNetChange = Absolute value of Typical Price - Typical Price 1 bar ago = ABS((H+L+C)/3 - (H1+L1+C1)/3)

So, substituting values:

TSI = WMA(WMA((H+L+C)/3 - (H1+L1+C1)/3, 63),21) / WMA(WMA(ABS((H+L+C)/3 - (H1+L1+C1)/3), 63),21)

Thanks in advance for help with this.

Also:  The question refers to TC 2007 software.  Also, how can the same TSI with WMA be created in TC 2000 latest version?

I cannot think of a simple way to change the parameters. I had to re-write the entire formula from scratch:

(1323 * (H + L + C) + 1239 * (H1 + L1 + C1) + 1156 * (H2 + L2 + C2) + 1074 * (H3 + L3 + C3) + 993 * (H4 + L4 + C4) + 913 * (H5 + L5 + C5) + 834 * (H6 + L6 + C6) + 756 * (H7 + L7 + C7) + 679 * (H8 + L8 + C8) + 603 * (H9 + L9 + C9) + 528 * (H10 + L10 + C10) + 454 * (H11 + L11 + C11) + 381 * (H12 + L12 + C12) + 309 * (H13 + L13 + C13) + 238 * (H14 + L14 + C14) + 168 * (H15 + L15 + C15) + 99 * (H16 + L16 + C16) + 31 * (H17 + L17 + C17) - 36 * (H18 + L18 + C18) - 102 * (H19 + L19 + C19) - 167 * (H20 + L20 + C20) - 9933 * (AVGH43.21 + AVGL43.21 + AVGC43.21) - 210 * (H64 + L64 + C64) - 190 * (H65 + L65 + C65) - 171 * (H66 + L66 + C66) - 153 * (H67 + L67 + C67) - 136 * (H68 + L68 + C68) - 120 * (H69 + L69 + C69) - 105 * (H70 + L70 + C70) - 91 * (H71 + L71 + C71) - 78 * (H72 + L72 + C72) - 66 * (H73 + L73 + C73) - 55 * (H74 + L74 + C74) - 45 * (H75 + L75 + C75) - 36 * (H76 + L76 + C76) - 28 * (H77 + L77 + C77) - 21 * (H78 + L78 + C78) - 15 * (H79 + L79 + C79) - 10 * (H80 + L80 + C80) - 6 * (H81 + L81 + C81) - 3 * (H82 + L82 + C82) - H83 - L83 - C83) / (1323 * ABS(H + L + C - H1 - L1 - C1) + 2562 * ABS(H1 + L1 + C1 - H2 - L2 - C2) + 3718 * ABS(H2 + L2 + C2 - H3 - L3 - C3) + 4792 * ABS(H3 + L3 + C3 - H4 - L4 - C4) + 5785 * ABS(H4 + L4 + C4 - H5 - L5 - C5) + 6698 * ABS(H5 + L5 + C5 - H6 - L6 - C6) + 7532 * ABS(H6 + L6 + C6 - H7 - L7 - C7) + 8288 * ABS(H7 + L7 + C7 - H8 - L8 - C8) + 8967 * ABS(H8 + L8 + C8 - H9 - L9 - C9) + 9570 * ABS(H9 + L9 + C9 - H10 - L10 - C10) + 10098 * ABS(H10 + L10 + C10 - H11 - L11 - C11) + 10552 * ABS(H11 + L11 + C11 - H12 - L12 - C12) + 10933 * ABS(H12 + L12 + C12 - H13 - L13 - C13) + 11242 * ABS(H13 + L13 + C13 - H14 - L14 - C14) + 11480 * ABS(H14 + L14 + C14 - H15 - L15 - C15) + 11648 * ABS(H15 + L15 + C15 - H16 - L16 - C16) + 11747 * ABS(H16 + L16 + C16 - H17 - L17 - C17) + 11778 * ABS(H17 + L17 + C17 - H18 - L18 - C18) + 11742 * ABS(H18 + L18 + C18 - H19 - L19 - C19) + 11640 * ABS(H19 + L19 + C19 - H20 - L20 - C20) + 11473 * ABS(H20 + L20 + C20 - H21 - L21 - C21) + 11242 * ABS(H21 + L21 + C21 - H22 - L22 - C22) + 11011 * ABS(H22 + L22 + C22 - H23 - L23 - C23) + 10780 * ABS(H23 + L23 + C23 - H24 - L24 - C24) + 10549 * ABS(H24 + L24 + C24 - H25 - L25 - C25) + 10318 * ABS(H25 + L25 + C25 - H26 - L26 - C26) + 10087 * ABS(H26 + L26 + C26 - H27 - L27 - C27) + 9856 * ABS(H27 + L27 + C27 - H28 - L28 - C28) + 9625 * ABS(H28 + L28 + C28 - H29 - L29 - C29) + 9394 * ABS(H29 + L29 + C29 - H30 - L30 - C30) + 9163 * ABS(H30 + L30 + C30 - H31 - L31 - C31) + 8932 * ABS(H31 + L31 + C31 - H32 - L32 - C32) + 8701 * ABS(H32 + L32 + C32 - H33 - L33 - C33) + 8470 * ABS(H33 + L33 + C33 - H34 - L34 - C34) + 8239 * ABS(H34 + L34 + C34 - H35 - L35 - C35) + 8008 * ABS(H35 + L35 + C35 - H36 - L36 - C36) + 7777 * ABS(H36 + L36 + C36 - H37 - L37 - C37) + 7546 * ABS(H37 + L37 + C37 - H38 - L38 - C38) + 7315 * ABS(H38 + L38 + C38 - H39 - L39 - C39) + 7084 * ABS(H39 + L39 + C39 - H40 - L40 - C40) + 6853 * ABS(H40 + L40 + C40 - H41 - L41 - C41) + 6622 * ABS(H41 + L41 + C41 - H42 - L42 - C42) + 6391 * ABS(H42 + L42 + C42 - H43 - L43 - C43) + 6160 * ABS(H43 + L43 + C43 - H44 - L44 - C44) + 5929 * ABS(H44 + L44 + C44 - H45 - L45 - C45) + 5698 * ABS(H45 + L45 + C45 - H46 - L46 - C46) + 5467 * ABS(H46 + L46 + C46 - H47 - L47 - C47) + 5236 * ABS(H47 + L47 + C47 - H48 - L48 - C48) + 5005 * ABS(H48 + L48 + C48 - H49 - L49 - C49) + 4774 * ABS(H49 + L49 + C49 - H50 - L50 - C50) + 4543 * ABS(H50 + L50 + C50 - H51 - L51 - C51) + 4312 * ABS(H51 + L51 + C51 - H52 - L52 - C52) + 4081 * ABS(H52 + L52 + C52 - H53 - L53 - C53) + 3850 * ABS(H53 + L53 + C53 - H54 - L54 - C54) + 3619 * ABS(H54 + L54 + C54 - H55 - L55 - C55) + 3388 * ABS(H55 + L55 + C55 - H56 - L56 - C56) + 3157 * ABS(H56 + L56 + C56 - H57 - L57 - C57) + 2926 * ABS(H57 + L57 + C57 - H58 - L58 - C58) + 2695 * ABS(H58 + L58 + C58 - H59 - L59 - C59) + 2464 * ABS(H59 + L59 + C59 - H60 - L60 - C60) + 2233 * ABS(H60 + L60 + C60 - H61 - L61 - C61) + 2002 * ABS(H61 + L61 + C61 - H62 - L62 - C62) + 1771 * ABS(H62 + L62 + C62 - H63 - L63 - C63) + 1540 * ABS(H63 + L63 + C63 - H64 - L64 - C64) + 1330 * ABS(H64 + L64 + C64 - H65 - L65 - C65) + 1140 * ABS(H65 + L65 + C65 - H66 - L66 - C66) + 969 * ABS(H66 + L66 + C66 - H67 - L67 - C67) + 816 * ABS(H67 + L67 + C67 - H68 - L68 - C68) + 680 * ABS(H68 + L68 + C68 - H69 - L69 - C69) + 560 * ABS(H69 + L69 + C69 - H70 - L70 - C70) + 455 * ABS(H70 + L70 + C70 - H71 - L71 - C71) + 364 * ABS(H71 + L71 + C71 - H72 - L72 - C72) + 286 * ABS(H72 + L72 + C72 - H73 - L73 - C73) + 220 * ABS(H73 + L73 + C73 - H74 - L74 - C74) + 165 * ABS(H74 + L74 + C74 - H75 - L75 - C75) + 120 * ABS(H75 + L75 + C75 - H76 - L76 - C76) + 84 * ABS(H76 + L76 + C76 - H77 - L77 - C77) + 56 * ABS(H77 + L77 + C77 - H78 - L78 - C78) + 35 * ABS(H78 + L78 + C78 - H79 - L79 - C79) + 20 * ABS(H79 + L79 + C79 - H80 - L80 - C80) + 10 * ABS(H80 + L80 + C80 - H81 - L81 - C81) + 4 * ABS(H81 + L81 + C81 - H82 - L82 - C82) + ABS(H82 + L82 + C82 - H83 - L83 - C83))

You would need to create a Custom PCF Indicator in TC2000 version 12.3 for this as well. The built in TSI indicator uses exponential smoothing and there is no setting available to change the type of moving averages used in the calculations.

Ah'll be damt.